Finding the Fourth Proportional to 22,631.28, 31,231.32 and 13,200.24

Step by Step Solution

1. Step 1: Write the proportion equation
   22,631.28 : 31,231.32 = 13,200.24 : x
2. Step 2: Convert to fraction form
   22,631.28/31,231.32 = 13,200.24/x
3. Step 3: Cross multiply
   22,631.28x = 31,231.32 × 13,200.24
4. Step 4: Simplify right side
   22,631.28x = 412,260,919.52
5. Step 5: Solve for x
   x = 412,260,919.52/22,631.28
6. Step 6: Final answer
   x = 18,216.42