Finding the Fourth Proportional to 23,139.57, 31,932.71 and 12,529.19

Step by Step Solution

1. Step 1: Write the proportion equation
   23,139.57 : 31,932.71 = 12,529.19 : x
2. Step 2: Convert to fraction form
   23,139.57/31,932.71 = 12,529.19/x
3. Step 3: Cross multiply
   23,139.57x = 31,932.71 × 12,529.19
4. Step 4: Simplify right side
   23,139.57x = 400,090,768.50
5. Step 5: Solve for x
   x = 400,090,768.50/23,139.57
6. Step 6: Final answer
   x = 17,290.33