Question

what was the purpose for performing hiranya garbha

Answer 1

This ritual was performed by rulers who were non kshatriya by birth. People accepted a ruler more easily if they were kshatriya because the kshatriya jat belonged to warriors and kings. non kshatriya by birth could become k shatriya by performing this ritual and proclaim themselves as a kshatriya ruler. For ex. When the rashtrakuta ruler Dantidurga conquered malwa and parts of gujrat he performed the mahadana and hiranyagarbha ritual to proclaim himself as a capable kshatriya ruler of the particular regions and everywhere else.