Finding the Fourth Proportional to 3,724.50, 5,138.88 and 2,399.97

Step by Step Solution

1. Step 1: Write the proportion equation
   3,724.50 : 5,138.88 = 2,399.97 : x
2. Step 2: Convert to fraction form
   3,724.50/5,138.88 = 2,399.97/x
3. Step 3: Cross multiply
   3,724.50x = 5,138.88 × 2,399.97
4. Step 4: Simplify right side
   3,724.50x = 12,333,157.83
5. Step 5: Solve for x
   x = 12,333,157.83/3,724.50
6. Step 6: Final answer
   x = 3,311.36