Finding the Fourth Proportional to 2,607.16, 3,910.33 and 852.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.16 : 3,910.33 = 852.15 : x
2. Step 2: Convert to fraction form
   2,607.16/3,910.33 = 852.15/x
3. Step 3: Cross multiply
   2,607.16x = 3,910.33 × 852.15
4. Step 4: Simplify right side
   2,607.16x = 3,332,183.45
5. Step 5: Solve for x
   x = 3,332,183.45/2,607.16
6. Step 6: Final answer
   x = 1,278.09