Finding the Fourth Proportional to 23,139.86, 31,933.22 and 12,529.71

Step by Step Solution

1. Step 1: Write the proportion equation
   23,139.86 : 31,933.22 = 12,529.71 : x
2. Step 2: Convert to fraction form
   23,139.86/31,933.22 = 12,529.71/x
3. Step 3: Cross multiply
   23,139.86x = 31,933.22 × 12,529.71
4. Step 4: Simplify right side
   23,139.86x = 400,113,923.32
5. Step 5: Solve for x
   x = 400,113,923.32/23,139.86
6. Step 6: Final answer
   x = 17,291.12