Finding the Fourth Proportional to 3,900.15, 5,381.85 and 2,198.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.15 : 5,381.85 = 2,198.82 : x
2. Step 2: Convert to fraction form
   3,900.15/5,381.85 = 2,198.82/x
3. Step 3: Cross multiply
   3,900.15x = 5,381.85 × 2,198.82
4. Step 4: Simplify right side
   3,900.15x = 11,833,719.42
5. Step 5: Solve for x
   x = 11,833,719.42/3,900.15
6. Step 6: Final answer
   x = 3,034.17