Finding the Fourth Proportional to 31,081.60, 42,892.68 and 16,934.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,081.60 : 42,892.68 = 16,934.68 : x
2. Step 2: Convert to fraction form
   31,081.60/42,892.68 = 16,934.68/x
3. Step 3: Cross multiply
   31,081.60x = 42,892.68 × 16,934.68
4. Step 4: Simplify right side
   31,081.60x = 726,373,810.14
5. Step 5: Solve for x
   x = 726,373,810.14/31,081.60
6. Step 6: Final answer
   x = 23,369.90