Finding the Fourth Proportional to 31,088.88, 42,901.80 and 16,942

Step by Step Solution

1. Step 1: Write the proportion equation
   31,088.88 : 42,901.80 = 16,942 : x
2. Step 2: Convert to fraction form
   31,088.88/42,901.80 = 16,942/x
3. Step 3: Cross multiply
   31,088.88x = 42,901.80 × 16,942
4. Step 4: Simplify right side
   31,088.88x = 726,842,295.60
5. Step 5: Solve for x
   x = 726,842,295.60/31,088.88
6. Step 6: Final answer
   x = 23,379.49