An analyst has valued an investment today, at $25,000. The investment pays $ X one year from now, $X two years from now, nothing at t-3, and $ 2X on t-4. This pattern will continue in perpetuity (i.e, $X on t-5, S X on t-6, nothing at t-7, and $ 2X on t-8; etc.). If the effective annual rate that she has used is 10%, what is your estimate of X?