Finding the Fourth Proportional to 31,087.10, 42,899.64 and 17,658.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,087.10 : 42,899.64 = 17,658.20 : x
2. Step 2: Convert to fraction form
   31,087.10/42,899.64 = 17,658.20/x
3. Step 3: Cross multiply
   31,087.10x = 42,899.64 × 17,658.20
4. Step 4: Simplify right side
   31,087.10x = 757,530,423.05
5. Step 5: Solve for x
   x = 757,530,423.05/31,087.10
6. Step 6: Final answer
   x = 24,368.00