payments on a debt were originally scheduled as follows: $500 in 9 months from today. $600 in 15 months from today, and $800 in 21 months from today. What is the equivalent payment 15 months from today if interest is 5.3% compounded quarterly?

3. Payments on a debt were originally scheduled as follows: $500 in 9 months from today, $600 in 15 months from today, and $800 in 21 months from today. What is the equivalent payment 15 months from today if interest is 5.3% compounded quarterly? (Ans: $1.892.55)