Finding the Fourth Proportional to 22,728.38, 31,355.01 and 13,292.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,728.38 : 31,355.01 = 13,292.78 : x
2. Step 2: Convert to fraction form
   22,728.38/31,355.01 = 13,292.78/x
3. Step 3: Cross multiply
   22,728.38x = 31,355.01 × 13,292.78
4. Step 4: Simplify right side
   22,728.38x = 416,795,249.83
5. Step 5: Solve for x
   x = 416,795,249.83/22,728.38
6. Step 6: Final answer
   x = 18,338.10