Finding the Fourth Proportional to 23,151.10, 31,948.44 and 12,540.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,151.10 : 31,948.44 = 12,540.72 : x
2. Step 2: Convert to fraction form
   23,151.10/31,948.44 = 12,540.72/x
3. Step 3: Cross multiply
   23,151.10x = 31,948.44 × 12,540.72
4. Step 4: Simplify right side
   23,151.10x = 400,656,440.48
5. Step 5: Solve for x
   x = 400,656,440.48/23,151.10
6. Step 6: Final answer
   x = 17,306.15