Finding the Fourth Proportional to 31,081.86, 42,892.95 and 16,934.70

Step by Step Solution

1. Step 1: Write the proportion equation
   31,081.86 : 42,892.95 = 16,934.70 : x
2. Step 2: Convert to fraction form
   31,081.86/42,892.95 = 16,934.70/x
3. Step 3: Cross multiply
   31,081.86x = 42,892.95 × 16,934.70
4. Step 4: Simplify right side
   31,081.86x = 726,379,240.37
5. Step 5: Solve for x
   x = 726,379,240.37/31,081.86
6. Step 6: Final answer
   x = 23,369.88