Finding the Fourth Proportional to 2,626.56, 3,940.04 and 871.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.56 : 3,940.04 = 871.49 : x
2. Step 2: Convert to fraction form
   2,626.56/3,940.04 = 871.49/x
3. Step 3: Cross multiply
   2,626.56x = 3,940.04 × 871.49
4. Step 4: Simplify right side
   2,626.56x = 3,433,717.49
5. Step 5: Solve for x
   x = 3,433,717.49/2,626.56
6. Step 6: Final answer
   x = 1,307.31