Calculating Present Value

For each of the following, compute the present value:

Present Value Years Interest Rate Future Value

$?17\mathrm{.}9\%$ $$16,832$

$?9\mathrm{.}7\%$ $$48,318$

$?23\mathrm{.}13\%$ $$886,073$

$?3521\%$ $$550,164$