Finding the Fourth Proportional to 2,626.76, 3,939.59 and 777.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.76 : 3,939.59 = 777.44 : x
2. Step 2: Convert to fraction form
   2,626.76/3,939.59 = 777.44/x
3. Step 3: Cross multiply
   2,626.76x = 3,939.59 × 777.44
4. Step 4: Simplify right side
   2,626.76x = 3,062,795.56
5. Step 5: Solve for x
   x = 3,062,795.56/2,626.76
6. Step 6: Final answer
   x = 1,166.00