Finding the Fourth Proportional to 31,112.38, 42,934.15 and 16,965.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,112.38 : 42,934.15 = 16,965.50 : x
2. Step 2: Convert to fraction form
   31,112.38/42,934.15 = 16,965.50/x
3. Step 3: Cross multiply
   31,112.38x = 42,934.15 × 16,965.50
4. Step 4: Simplify right side
   31,112.38x = 728,399,321.83
5. Step 5: Solve for x
   x = 728,399,321.83/31,112.38
6. Step 6: Final answer
   x = 23,411.88