Finding the Fourth Proportional to 13,724.50, 18,939.81 and 7,436.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,724.50 : 18,939.81 = 7,436.88 : x
2. Step 2: Convert to fraction form
   13,724.50/18,939.81 = 7,436.88/x
3. Step 3: Cross multiply
   13,724.50x = 18,939.81 × 7,436.88
4. Step 4: Simplify right side
   13,724.50x = 140,853,094.19
5. Step 5: Solve for x
   x = 140,853,094.19/13,724.50
6. Step 6: Final answer
   x = 10,262.89