Finding the Fourth Proportional to 7,642.48, 10,545.24 and 5,128.24

Step by Step Solution

1. Step 1: Write the proportion equation
   7,642.48 : 10,545.24 = 5,128.24 : x
2. Step 2: Convert to fraction form
   7,642.48/10,545.24 = 5,128.24/x
3. Step 3: Cross multiply
   7,642.48x = 10,545.24 × 5,128.24
4. Step 4: Simplify right side
   7,642.48x = 54,078,521.58
5. Step 5: Solve for x
   x = 54,078,521.58/7,642.48
6. Step 6: Final answer
   x = 7,076.04