Finding the Fourth Proportional to 22,502.56, 31,052.88 and 12,431.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,502.56 : 31,052.88 = 12,431.20 : x
2. Step 2: Convert to fraction form
   22,502.56/31,052.88 = 12,431.20/x
3. Step 3: Cross multiply
   22,502.56x = 31,052.88 × 12,431.20
4. Step 4: Simplify right side
   22,502.56x = 386,024,561.86
5. Step 5: Solve for x
   x = 386,024,561.86/22,502.56
6. Step 6: Final answer
   x = 17,154.70