Finding the Fourth Proportional to 7,128.96, 10,689.31 and 2,197.27

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.96 : 10,689.31 = 2,197.27 : x
2. Step 2: Convert to fraction form
   7,128.96/10,689.31 = 2,197.27/x
3. Step 3: Cross multiply
   7,128.96x = 10,689.31 × 2,197.27
4. Step 4: Simplify right side
   7,128.96x = 23,487,300.18
5. Step 5: Solve for x
   x = 23,487,300.18/7,128.96
6. Step 6: Final answer
   x = 3,294.63