Finding the Fourth Proportional to 5,540.05, 7,640.17 and 4,127.23

Step by Step Solution

1. Step 1: Write the proportion equation
   5,540.05 : 7,640.17 = 4,127.23 : x
2. Step 2: Convert to fraction form
   5,540.05/7,640.17 = 4,127.23/x
3. Step 3: Cross multiply
   5,540.05x = 7,640.17 × 4,127.23
4. Step 4: Simplify right side
   5,540.05x = 31,532,738.83
5. Step 5: Solve for x
   x = 31,532,738.83/5,540.05
6. Step 6: Final answer
   x = 5,691.78