Krista borrowed $$16,623.$ The loan is to be repaid by three equal payments due in $90,139,$ and $291$ days from now respectively. Determine the size of the equal payments at an interest rate of $7\%$ with a focal date of today.

The size of the equal payments is $

$($Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.$)$