Finding the Fourth Proportional to 23,108.92, 31,890.30 and 12,498.55

Step by Step Solution

1. Step 1: Write the proportion equation
   23,108.92 : 31,890.30 = 12,498.55 : x
2. Step 2: Convert to fraction form
   23,108.92/31,890.30 = 12,498.55/x
3. Step 3: Cross multiply
   23,108.92x = 31,890.30 × 12,498.55
4. Step 4: Simplify right side
   23,108.92x = 398,582,469.20
5. Step 5: Solve for x
   x = 398,582,469.20/23,108.92
6. Step 6: Final answer
   x = 17,247.99