Finding the Fourth Proportional to 3,966.72, 5,474.24 and 2,198.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,966.72 : 5,474.24 = 2,198.31 : x
2. Step 2: Convert to fraction form
   3,966.72/5,474.24 = 2,198.31/x
3. Step 3: Cross multiply
   3,966.72x = 5,474.24 × 2,198.31
4. Step 4: Simplify right side
   3,966.72x = 12,034,076.53
5. Step 5: Solve for x
   x = 12,034,076.53/3,966.72
6. Step 6: Final answer
   x = 3,033.76