Finding the Fourth Proportional to 2,659.15, 3,987.24 and 1,098.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.15 : 3,987.24 = 1,098.28 : x
2. Step 2: Convert to fraction form
   2,659.15/3,987.24 = 1,098.28/x
3. Step 3: Cross multiply
   2,659.15x = 3,987.24 × 1,098.28
4. Step 4: Simplify right side
   2,659.15x = 4,379,105.95
5. Step 5: Solve for x
   x = 4,379,105.95/2,659.15
6. Step 6: Final answer
   x = 1,646.81