There is clearly no evidence in the sources for such a prescription; therefore, it is based purely on guess work. In Islam, no one has authority to prescribe acts of worship obliging people to observe them; we have no authority to legislate such matters. It is the sole realm of Allah and His Messenger (peace be upon him).
So, you should simply ignore such prescriptions and follow the method prescribed by the Prophet (peace be upon him). The sunnah method of praying to Allah for fulfilling a particular need is to pray two rak'ahs known as salatul hajah and offer the following supplication:
La ilaha illallahul haleemul karee; Subhanallaahi rabbil 'arshil azheem; al-hamdulillaahi rabbil 'aalameen, as'aluka Mookibaati rahmatika wa 'azaa'ima maghfiratika wal ghaneemata min kulli birrin, wa ssalaamata min kulli ithmin, laa tada' lee dhanban Illaa ghafartahu walaa hamman illaa farrajtahu, walaa haajatan hiya laka ridhan illaa qadhaytahaa yaa arhama al-rrahimeen.
(There no god but Allah, the Clement and Wise. There is no god but Allah, the High and Mighty.
Glory be to Allah, Lord of the Tremendous Throne.All praise is to Allah, Lord of the worlds. I ask you (O Allah) everything that leads to your mercy, and your forgiveness, and all that is good, and freedom from all that is sinful. Do not leave for me an sin without forgiveness, and no worry of mine without removing it, and no legitimate need of mine, which conforms to your goodly pleasure without fulfilling it, O the Most Merciful!)