Finding the Fourth Proportional to 3,635.98, 5,454.24 and 3,439.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,635.98 : 5,454.24 = 3,439.15 : x
2. Step 2: Convert to fraction form
   3,635.98/5,454.24 = 3,439.15/x
3. Step 3: Cross multiply
   3,635.98x = 5,454.24 × 3,439.15
4. Step 4: Simplify right side
   3,635.98x = 18,757,949.50
5. Step 5: Solve for x
   x = 18,757,949.50/3,635.98
6. Step 6: Final answer
   x = 5,158.98