Finding the Fourth Proportional to 23,139.48, 31,932.48 and 12,529.12

Step by Step Solution

1. Step 1: Write the proportion equation
   23,139.48 : 31,932.48 = 12,529.12 : x
2. Step 2: Convert to fraction form
   23,139.48/31,932.48 = 12,529.12/x
3. Step 3: Cross multiply
   23,139.48x = 31,932.48 × 12,529.12
4. Step 4: Simplify right side
   23,139.48x = 400,085,873.82
5. Step 5: Solve for x
   x = 400,085,873.82/23,139.48
6. Step 6: Final answer
   x = 17,290.18