Finding the Fourth Proportional to 2,626.76, 3,940.72 and 778.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.76 : 3,940.72 = 778.02 : x
2. Step 2: Convert to fraction form
   2,626.76/3,940.72 = 778.02/x
3. Step 3: Cross multiply
   2,626.76x = 3,940.72 × 778.02
4. Step 4: Simplify right side
   2,626.76x = 3,065,957.03
5. Step 5: Solve for x
   x = 3,065,957.03/2,626.76
6. Step 6: Final answer
   x = 1,167.20