Finding the Fourth Proportional to 13,724.27, 18,939.56 and 7,436.65

Step by Step Solution

1. Step 1: Write the proportion equation
   13,724.27 : 18,939.56 = 7,436.65 : x
2. Step 2: Convert to fraction form
   13,724.27/18,939.56 = 7,436.65/x
3. Step 3: Cross multiply
   13,724.27x = 18,939.56 × 7,436.65
4. Step 4: Simplify right side
   13,724.27x = 140,846,878.87
5. Step 5: Solve for x
   x = 140,846,878.87/13,724.27
6. Step 6: Final answer
   x = 10,262.61