Finding the Fourth Proportional to 31,639.50, 43,658.72 and 17,490.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,639.50 : 43,658.72 = 17,490.42 : x
2. Step 2: Convert to fraction form
   31,639.50/43,658.72 = 17,490.42/x
3. Step 3: Cross multiply
   31,639.50x = 43,658.72 × 17,490.42
4. Step 4: Simplify right side
   31,639.50x = 763,609,349.46
5. Step 5: Solve for x
   x = 763,609,349.46/31,639.50
6. Step 6: Final answer
   x = 24,134.68