Finding the Fourth Proportional to 2,626.83, 3,940.85 and 777.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.83 : 3,940.85 = 777.96 : x
2. Step 2: Convert to fraction form
   2,626.83/3,940.85 = 777.96/x
3. Step 3: Cross multiply
   2,626.83x = 3,940.85 × 777.96
4. Step 4: Simplify right side
   2,626.83x = 3,065,819.78
5. Step 5: Solve for x
   x = 3,065,819.78/2,626.83
6. Step 6: Final answer
   x = 1,167.12