Finding the Fourth Proportional to 31,066.43, 42,872.88 and 17,638.93

Step by Step Solution

1. Step 1: Write the proportion equation
   31,066.43 : 42,872.88 = 17,638.93 : x
2. Step 2: Convert to fraction form
   31,066.43/42,872.88 = 17,638.93/x
3. Step 3: Cross multiply
   31,066.43x = 42,872.88 × 17,638.93
4. Step 4: Simplify right side
   31,066.43x = 756,231,826.91
5. Step 5: Solve for x
   x = 756,231,826.91/31,066.43
6. Step 6: Final answer
   x = 24,342.41