Finding the Fourth Proportional to 31,113.91, 42,937.46 and 16,966.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,113.91 : 42,937.46 = 16,966.72 : x
2. Step 2: Convert to fraction form
   31,113.91/42,937.46 = 16,966.72/x
3. Step 3: Cross multiply
   31,113.91x = 42,937.46 × 16,966.72
4. Step 4: Simplify right side
   31,113.91x = 728,507,861.33
5. Step 5: Solve for x
   x = 728,507,861.33/31,113.91
6. Step 6: Final answer
   x = 23,414.22