Finding the Fourth Proportional to 2,626.62, 3,940.15 and 871.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.62 : 3,940.15 = 871.25 : x
2. Step 2: Convert to fraction form
   2,626.62/3,940.15 = 871.25/x
3. Step 3: Cross multiply
   2,626.62x = 3,940.15 × 871.25
4. Step 4: Simplify right side
   2,626.62x = 3,432,837.08
5. Step 5: Solve for x
   x = 3,432,837.08/2,626.62
6. Step 6: Final answer
   x = 1,306.94