Finding the Fourth Proportional to 31,114.56, 42,937.20 and 17,687.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,114.56 : 42,937.20 = 17,687.28 : x
2. Step 2: Convert to fraction form
   31,114.56/42,937.20 = 17,687.28/x
3. Step 3: Cross multiply
   31,114.56x = 42,937.20 × 17,687.28
4. Step 4: Simplify right side
   31,114.56x = 759,442,278.82
5. Step 5: Solve for x
   x = 759,442,278.82/31,114.56
6. Step 6: Final answer
   x = 24,407.94