Finding the Fourth Proportional to 2,626.99, 3,940.71 and 871.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.99 : 3,940.71 = 871.62 : x
2. Step 2: Convert to fraction form
   2,626.99/3,940.71 = 871.62/x
3. Step 3: Cross multiply
   2,626.99x = 3,940.71 × 871.62
4. Step 4: Simplify right side
   2,626.99x = 3,434,801.65
5. Step 5: Solve for x
   x = 3,434,801.65/2,626.99
6. Step 6: Final answer
   x = 1,307.51