Finding the Fourth Proportional to 31,086.18, 42,899.92 and 17,656.64

Step by Step Solution

1. Step 1: Write the proportion equation
   31,086.18 : 42,899.92 = 17,656.64 : x
2. Step 2: Convert to fraction form
   31,086.18/42,899.92 = 17,656.64/x
3. Step 3: Cross multiply
   31,086.18x = 42,899.92 × 17,656.64
4. Step 4: Simplify right side
   31,086.18x = 757,468,443.47
5. Step 5: Solve for x
   x = 757,468,443.47/31,086.18
6. Step 6: Final answer
   x = 24,366.73