Finding the Fourth Proportional to 7,128.72, 10,693.02 and 2,747.16

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.72 : 10,693.02 = 2,747.16 : x
2. Step 2: Convert to fraction form
   7,128.72/10,693.02 = 2,747.16/x
3. Step 3: Cross multiply
   7,128.72x = 10,693.02 × 2,747.16
4. Step 4: Simplify right side
   7,128.72x = 29,375,436.82
5. Step 5: Solve for x
   x = 29,375,436.82/7,128.72
6. Step 6: Final answer
   x = 4,120.72