For each of the following, compute the present value:

Note: Do not round Intermedlate calculations and round your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

$\backslash$table$[[$Present Value,Years,Interest Rate,Future Value$],[12,4,\%,$$$,17,728],[,4,9,\%,,41,917],[,16,12,\%,,794,382],[,21,11,\%,,651,816]]$