Finding the Fourth Proportional to 23,012.38, 31,753.12 and 12,939.42

Step by Step Solution

1. Step 1: Write the proportion equation
   23,012.38 : 31,753.12 = 12,939.42 : x
2. Step 2: Convert to fraction form
   23,012.38/31,753.12 = 12,939.42/x
3. Step 3: Cross multiply
   23,012.38x = 31,753.12 × 12,939.42
4. Step 4: Simplify right side
   23,012.38x = 410,866,891.29
5. Step 5: Solve for x
   x = 410,866,891.29/23,012.38
6. Step 6: Final answer
   x = 17,854.17