Finding the Fourth Proportional to 5,399.50, 7,454.55 and 3,539.74

Step by Step Solution

1. Step 1: Write the proportion equation
   5,399.50 : 7,454.55 = 3,539.74 : x
2. Step 2: Convert to fraction form
   5,399.50/7,454.55 = 3,539.74/x
3. Step 3: Cross multiply
   5,399.50x = 7,454.55 × 3,539.74
4. Step 4: Simplify right side
   5,399.50x = 26,387,168.82
5. Step 5: Solve for x
   x = 26,387,168.82/5,399.50
6. Step 6: Final answer
   x = 4,886.97