Finding the Fourth Proportional to 31,113.86, 42,937.29 and 16,966.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,113.86 : 42,937.29 = 16,966.40 : x
2. Step 2: Convert to fraction form
   31,113.86/42,937.29 = 16,966.40/x
3. Step 3: Cross multiply
   31,113.86x = 42,937.29 × 16,966.40
4. Step 4: Simplify right side
   31,113.86x = 728,491,022.37
5. Step 5: Solve for x
   x = 728,491,022.37/31,113.86
6. Step 6: Final answer
   x = 23,413.72