Finding the Fourth Proportional to 3,868.50, 5,339.86 and 2,608.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,868.50 : 5,339.86 = 2,608.75 : x
2. Step 2: Convert to fraction form
   3,868.50/5,339.86 = 2,608.75/x
3. Step 3: Cross multiply
   3,868.50x = 5,339.86 × 2,608.75
4. Step 4: Simplify right side
   3,868.50x = 13,930,339.90
5. Step 5: Solve for x
   x = 13,930,339.90/3,868.50
6. Step 6: Final answer
   x = 3,600.97