Finding the Fourth Proportional to 3,960.96, 5,454.98 and 3,874.85

Step by Step Solution

1. Step 1: Write the proportion equation
   3,960.96 : 5,454.98 = 3,874.85 : x
2. Step 2: Convert to fraction form
   3,960.96/5,454.98 = 3,874.85/x
3. Step 3: Cross multiply
   3,960.96x = 5,454.98 × 3,874.85
4. Step 4: Simplify right side
   3,960.96x = 21,137,229.25
5. Step 5: Solve for x
   x = 21,137,229.25/3,960.96
6. Step 6: Final answer
   x = 5,336.39