Finding the Fourth Proportional to 7,128.56, 10,693.98 and 2,198.19

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.56 : 10,693.98 = 2,198.19 : x
2. Step 2: Convert to fraction form
   7,128.56/10,693.98 = 2,198.19/x
3. Step 3: Cross multiply
   7,128.56x = 10,693.98 × 2,198.19
4. Step 4: Simplify right side
   7,128.56x = 23,507,399.90
5. Step 5: Solve for x
   x = 23,507,399.90/7,128.56
6. Step 6: Final answer
   x = 3,297.64