Financial calculators and excel are not allowed. I need step by step workouts of the problem. Thank you!

8. On Lydia's 16th birthday, she received an inheritance from an uncle. However, the will stipulates that the inheritance will be paid at the beginning of each quarter for 12 years with the first payment being made today. If the quarterly payments are $4,611.73, how much did she inherit? Assume an interest rate of 4.2% compounded quarterly