Finding the Fourth Proportional to 23,139.65, 31,932.72 and 12,529.29

Step by Step Solution

1. Step 1: Write the proportion equation
   23,139.65 : 31,932.72 = 12,529.29 : x
2. Step 2: Convert to fraction form
   23,139.65/31,932.72 = 12,529.29/x
3. Step 3: Cross multiply
   23,139.65x = 31,932.72 × 12,529.29
4. Step 4: Simplify right side
   23,139.65x = 400,094,309.37
5. Step 5: Solve for x
   x = 400,094,309.37/23,139.65
6. Step 6: Final answer
   x = 17,290.43