Finding the Fourth Proportional to 13,724.05, 18,939.27 and 7,436.43

Step by Step Solution

1. Step 1: Write the proportion equation
   13,724.05 : 18,939.27 = 7,436.43 : x
2. Step 2: Convert to fraction form
   13,724.05/18,939.27 = 7,436.43/x
3. Step 3: Cross multiply
   13,724.05x = 18,939.27 × 7,436.43
4. Step 4: Simplify right side
   13,724.05x = 140,840,555.61
5. Step 5: Solve for x
   x = 140,840,555.61/13,724.05
6. Step 6: Final answer
   x = 10,262.32