Finding the Fourth Proportional to 2,578.88, 3,868.84 and 1,098.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.88 : 3,868.84 = 1,098.10 : x
2. Step 2: Convert to fraction form
   2,578.88/3,868.84 = 1,098.10/x
3. Step 3: Cross multiply
   2,578.88x = 3,868.84 × 1,098.10
4. Step 4: Simplify right side
   2,578.88x = 4,248,373.20
5. Step 5: Solve for x
   x = 4,248,373.20/2,578.88
6. Step 6: Final answer
   x = 1,647.37