Answer:
Present Value = Future Value / ( 1 + interest rate) ^ years
1. Present Value = 15,251 / ( 1 + 7%)¹³
= $6,328.62
2. Present value = 49,557 / (1 + 13%)⁴
= $30,394.24
3. Present value = 884,073 / ( 1 + 14%)²⁹
= $19,780.96
4. Present Value = 548,164 / (1 + 9%)⁴⁰
= $17,452.22