Finding the Fourth Proportional to 5,542.55, 7,644.78 and 5,359.49

Step by Step Solution

1. Step 1: Write the proportion equation
   5,542.55 : 7,644.78 = 5,359.49 : x
2. Step 2: Convert to fraction form
   5,542.55/7,644.78 = 5,359.49/x
3. Step 3: Cross multiply
   5,542.55x = 7,644.78 × 5,359.49
4. Step 4: Simplify right side
   5,542.55x = 40,972,083.74
5. Step 5: Solve for x
   x = 40,972,083.74/5,542.55
6. Step 6: Final answer
   x = 7,392.29