Finding the Fourth Proportional to 2,608.12, 3,912.56 and 876.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.12 : 3,912.56 = 876.16 : x
2. Step 2: Convert to fraction form
   2,608.12/3,912.56 = 876.16/x
3. Step 3: Cross multiply
   2,608.12x = 3,912.56 × 876.16
4. Step 4: Simplify right side
   2,608.12x = 3,428,028.57
5. Step 5: Solve for x
   x = 3,428,028.57/2,608.12
6. Step 6: Final answer
   x = 1,314.37