For each of the following, compute the present value: Note: Do not round intermediate calculations and round your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

$\backslash$table$[[$Present Value,Years,Interest Rate,,Future Value$],[17,12,4,\%,18,928],[5,4,9,\%,43,117],[,16,12,\%,806,382],[,21,11,\%,663,816]]$