Relationship between future value and present value: Mixed stream

The table below shows a mixed cash flow stream except that the cash flow for year 3 is missing.

Year 1 $10,000

Year 2 5,000

Year 3

Year 4 20,000

Year 53,000

Suppose that somehow you know that the present value of the entire stream is $32,911.03 and that the discount rate is 4%. What is the amount of the missing cash flow in year 3?

Show your OWN work. Thanks.