Finding the Fourth Proportional to 2,608.74, 3,911.67 and 876.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.74 : 3,911.67 = 876.42 : x
2. Step 2: Convert to fraction form
   2,608.74/3,911.67 = 876.42/x
3. Step 3: Cross multiply
   2,608.74x = 3,911.67 × 876.42
4. Step 4: Simplify right side
   2,608.74x = 3,428,265.82
5. Step 5: Solve for x
   x = 3,428,265.82/2,608.74
6. Step 6: Final answer
   x = 1,314.15