Finding the Fourth Proportional to 2,626.50, 3,939.33 and 872.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.50 : 3,939.33 = 872.28 : x
2. Step 2: Convert to fraction form
   2,626.50/3,939.33 = 872.28/x
3. Step 3: Cross multiply
   2,626.50x = 3,939.33 × 872.28
4. Step 4: Simplify right side
   2,626.50x = 3,436,198.77
5. Step 5: Solve for x
   x = 3,436,198.77/2,626.50
6. Step 6: Final answer
   x = 1,308.28