Finding the Fourth Proportional to 2,648.57, 3,971.42 and 1,108.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.57 : 3,971.42 = 1,108.25 : x
2. Step 2: Convert to fraction form
   2,648.57/3,971.42 = 1,108.25/x
3. Step 3: Cross multiply
   2,648.57x = 3,971.42 × 1,108.25
4. Step 4: Simplify right side
   2,648.57x = 4,401,320.67
5. Step 5: Solve for x
   x = 4,401,320.67/2,648.57
6. Step 6: Final answer
   x = 1,661.77