Finding the Fourth Proportional to 2,608.34, 3,912.46 and 876.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.34 : 3,912.46 = 876.96 : x
2. Step 2: Convert to fraction form
   2,608.34/3,912.46 = 876.96/x
3. Step 3: Cross multiply
   2,608.34x = 3,912.46 × 876.96
4. Step 4: Simplify right side
   2,608.34x = 3,431,070.92
5. Step 5: Solve for x
   x = 3,431,070.92/2,608.34
6. Step 6: Final answer
   x = 1,315.42