Finding the Fourth Proportional to 3,967.20, 5,474.78 and 2,198.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,967.20 : 5,474.78 = 2,198.83 : x
2. Step 2: Convert to fraction form
   3,967.20/5,474.78 = 2,198.83/x
3. Step 3: Cross multiply
   3,967.20x = 5,474.78 × 2,198.83
4. Step 4: Simplify right side
   3,967.20x = 12,038,110.51
5. Step 5: Solve for x
   x = 12,038,110.51/3,967.20
6. Step 6: Final answer
   x = 3,034.41