Finding the Fourth Proportional to 23,101.25, 31,879.71 and 12,490.88

Step by Step Solution

1. Step 1: Write the proportion equation
   23,101.25 : 31,879.71 = 12,490.88 : x
2. Step 2: Convert to fraction form
   23,101.25/31,879.71 = 12,490.88/x
3. Step 3: Cross multiply
   23,101.25x = 31,879.71 × 12,490.88
4. Step 4: Simplify right side
   23,101.25x = 398,205,472.65
5. Step 5: Solve for x
   x = 398,205,472.65/23,101.25
6. Step 6: Final answer
   x = 17,237.40