Finding the Fourth Proportional to 31,387.90, 43,315.56 and 17,241.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,387.90 : 43,315.56 = 17,241.06 : x
2. Step 2: Convert to fraction form
   31,387.90/43,315.56 = 17,241.06/x
3. Step 3: Cross multiply
   31,387.90x = 43,315.56 × 17,241.06
4. Step 4: Simplify right side
   31,387.90x = 746,806,168.89
5. Step 5: Solve for x
   x = 746,806,168.89/31,387.90
6. Step 6: Final answer
   x = 23,792.80