A project is being considered that will cost $17,000. Expected returns are $3000 at the end of years 1 and 2, and $X at the end of years 3 and 4, $3000 at the ends of years 5 and 6, $X at the end of years 7 and 8, with this pattern repeating itself forever. If the company wants to earn 15% on its money, what is the required value of X?