Finding the Fourth Proportional to 3,967.15, 5,474.36 and 2,198.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,967.15 : 5,474.36 = 2,198.72 : x
2. Step 2: Convert to fraction form
   3,967.15/5,474.36 = 2,198.72/x
3. Step 3: Cross multiply
   3,967.15x = 5,474.36 × 2,198.72
4. Step 4: Simplify right side
   3,967.15x = 12,036,584.82
5. Step 5: Solve for x
   x = 12,036,584.82/3,967.15
6. Step 6: Final answer
   x = 3,034.06