Finding the Fourth Proportional to 2,659.27, 3,988.81 and 1,098.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.27 : 3,988.81 = 1,098.88 : x
2. Step 2: Convert to fraction form
   2,659.27/3,988.81 = 1,098.88/x
3. Step 3: Cross multiply
   2,659.27x = 3,988.81 × 1,098.88
4. Step 4: Simplify right side
   2,659.27x = 4,383,223.53
5. Step 5: Solve for x
   x = 4,383,223.53/2,659.27
6. Step 6: Final answer
   x = 1,648.28