Finding the Fourth Proportional to 31,086.88, 42,899.04 and 16,940

Step by Step Solution

1. Step 1: Write the proportion equation
   31,086.88 : 42,899.04 = 16,940 : x
2. Step 2: Convert to fraction form
   31,086.88/42,899.04 = 16,940/x
3. Step 3: Cross multiply
   31,086.88x = 42,899.04 × 16,940
4. Step 4: Simplify right side
   31,086.88x = 726,709,737.60
5. Step 5: Solve for x
   x = 726,709,737.60/31,086.88
6. Step 6: Final answer
   x = 23,376.73