Finding the Fourth Proportional to 23,151.12, 31,948.32 and 12,540.64

Step by Step Solution

1. Step 1: Write the proportion equation
   23,151.12 : 31,948.32 = 12,540.64 : x
2. Step 2: Convert to fraction form
   23,151.12/31,948.32 = 12,540.64/x
3. Step 3: Cross multiply
   23,151.12x = 31,948.32 × 12,540.64
4. Step 4: Simplify right side
   23,151.12x = 400,652,379.72
5. Step 5: Solve for x
   x = 400,652,379.72/23,151.12
6. Step 6: Final answer
   x = 17,305.96