Finding the Fourth Proportional to 22,568.12, 31,150.30 and 13,138.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,568.12 : 31,150.30 = 13,138.52 : x
2. Step 2: Convert to fraction form
   22,568.12/31,150.30 = 13,138.52/x
3. Step 3: Cross multiply
   22,568.12x = 31,150.30 × 13,138.52
4. Step 4: Simplify right side
   22,568.12x = 409,268,839.56
5. Step 5: Solve for x
   x = 409,268,839.56/22,568.12
6. Step 6: Final answer
   x = 18,134.82