Finding the Fourth Proportional to 31,119.51, 42,937.55 and 17,689.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,119.51 : 42,937.55 = 17,689.71 : x
2. Step 2: Convert to fraction form
   31,119.51/42,937.55 = 17,689.71/x
3. Step 3: Cross multiply
   31,119.51x = 42,937.55 × 17,689.71
4. Step 4: Simplify right side
   31,119.51x = 759,552,807.61
5. Step 5: Solve for x
   x = 759,552,807.61/31,119.51
6. Step 6: Final answer
   x = 24,407.61