Finding the Fourth Proportional to 2,607.56, 3,910.36 and 852.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.56 : 3,910.36 = 852.15 : x
2. Step 2: Convert to fraction form
   2,607.56/3,910.36 = 852.15/x
3. Step 3: Cross multiply
   2,607.56x = 3,910.36 × 852.15
4. Step 4: Simplify right side
   2,607.56x = 3,332,213.27
5. Step 5: Solve for x
   x = 3,332,213.27/2,607.56
6. Step 6: Final answer
   x = 1,277.90