Finding the Fourth Proportional to 22,740.32, 31,379.56 and 13,309.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,740.32 : 31,379.56 = 13,309.60 : x
2. Step 2: Convert to fraction form
   22,740.32/31,379.56 = 13,309.60/x
3. Step 3: Cross multiply
   22,740.32x = 31,379.56 × 13,309.60
4. Step 4: Simplify right side
   22,740.32x = 417,649,391.78
5. Step 5: Solve for x
   x = 417,649,391.78/22,740.32
6. Step 6: Final answer
   x = 18,366.03