Please round intermediate values to $6$ decimals

Scheduled payments of $$1358,$$$1136,$ and $$907$ are due in one$-$and$-$a$-$half years, four$-$and$-$a$-$half years, and six years respectively. What is the equivalent single replacement payment two years from now if interest is $7\mathrm{.}8\%$ compounded quarterly?

The equivalent single replacement payment is $

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