Finding the Fourth Proportional to 7,151.16, 10,728.52 and 2,220.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,151.16 : 10,728.52 = 2,220.72 : x
2. Step 2: Convert to fraction form
   7,151.16/10,728.52 = 2,220.72/x
3. Step 3: Cross multiply
   7,151.16x = 10,728.52 × 2,220.72
4. Step 4: Simplify right side
   7,151.16x = 23,825,038.93
5. Step 5: Solve for x
   x = 23,825,038.93/7,151.16
6. Step 6: Final answer
   x = 3,331.63