A 30 year special bond has annual coupons and a maturity value of 100,000 . The annual coupons are 500 in the first year, 1,000 in the second year, 1,500 in the third year and continue to increase by 500 each year. Calculate the amount of principal in the 29th coupon assuming that the bond was purchased to a yield rate of 4.7%. (Round your answer to the nearest two decimal places)