Finding the Fourth Proportional to 23,139.91, 31,932.93 and 12,529.51

Step by Step Solution

1. Step 1: Write the proportion equation
   23,139.91 : 31,932.93 = 12,529.51 : x
2. Step 2: Convert to fraction form
   23,139.91/31,932.93 = 12,529.51/x
3. Step 3: Cross multiply
   23,139.91x = 31,932.93 × 12,529.51
4. Step 4: Simplify right side
   23,139.91x = 400,103,965.76
5. Step 5: Solve for x
   x = 400,103,965.76/23,139.91
6. Step 6: Final answer
   x = 17,290.64