Finding the Fourth Proportional to 2,608.27, 3,913.92 and 854.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.27 : 3,913.92 = 854.55 : x
2. Step 2: Convert to fraction form
   2,608.27/3,913.92 = 854.55/x
3. Step 3: Cross multiply
   2,608.27x = 3,913.92 × 854.55
4. Step 4: Simplify right side
   2,608.27x = 3,344,640.34
5. Step 5: Solve for x
   x = 3,344,640.34/2,608.27
6. Step 6: Final answer
   x = 1,282.32