Finding the Fourth Proportional to 22,631.13, 31,234.71 and 13,199.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,631.13 : 31,234.71 = 13,199.69 : x
2. Step 2: Convert to fraction form
   22,631.13/31,234.71 = 13,199.69/x
3. Step 3: Cross multiply
   22,631.13x = 31,234.71 × 13,199.69
4. Step 4: Simplify right side
   22,631.13x = 412,288,616.83
5. Step 5: Solve for x
   x = 412,288,616.83/22,631.13
6. Step 6: Final answer
   x = 18,217.77