Finding the Fourth Proportional to 31,108.34, 42,930.65 and 17,681.85

Step by Step Solution

1. Step 1: Write the proportion equation
   31,108.34 : 42,930.65 = 17,681.85 : x
2. Step 2: Convert to fraction form
   31,108.34/42,930.65 = 17,681.85/x
3. Step 3: Cross multiply
   31,108.34x = 42,930.65 × 17,681.85
4. Step 4: Simplify right side
   31,108.34x = 759,093,357.91
5. Step 5: Solve for x
   x = 759,093,357.91/31,108.34
6. Step 6: Final answer
   x = 24,401.60