Finding the Fourth Proportional to 31,081.12, 42,891.33 and 16,934.07

Step by Step Solution

1. Step 1: Write the proportion equation
   31,081.12 : 42,891.33 = 16,934.07 : x
2. Step 2: Convert to fraction form
   31,081.12/42,891.33 = 16,934.07/x
3. Step 3: Cross multiply
   31,081.12x = 42,891.33 × 16,934.07
4. Step 4: Simplify right side
   31,081.12x = 726,324,784.61
5. Step 5: Solve for x
   x = 726,324,784.61/31,081.12
6. Step 6: Final answer
   x = 23,368.68