Finding the Fourth Proportional to 5,541.55, 7,643.40 and 5,358.49

Step by Step Solution

1. Step 1: Write the proportion equation
   5,541.55 : 7,643.40 = 5,358.49 : x
2. Step 2: Convert to fraction form
   5,541.55/7,643.40 = 5,358.49/x
3. Step 3: Cross multiply
   5,541.55x = 7,643.40 × 5,358.49
4. Step 4: Simplify right side
   5,541.55x = 40,957,044.25
5. Step 5: Solve for x
   x = 40,957,044.25/5,541.55
6. Step 6: Final answer
   x = 7,390.91