Finding the Fourth Proportional to 2,626.56, 3,940.58 and 871.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.56 : 3,940.58 = 871.73 : x
2. Step 2: Convert to fraction form
   2,626.56/3,940.58 = 871.73/x
3. Step 3: Cross multiply
   2,626.56x = 3,940.58 × 871.73
4. Step 4: Simplify right side
   2,626.56x = 3,435,119.06
5. Step 5: Solve for x
   x = 3,435,119.06/2,626.56
6. Step 6: Final answer
   x = 1,307.84