Finding the Fourth Proportional to 2,627.52, 3,939.84 and 778.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.52 : 3,939.84 = 778.08 : x
2. Step 2: Convert to fraction form
   2,627.52/3,939.84 = 778.08/x
3. Step 3: Cross multiply
   2,627.52x = 3,939.84 × 778.08
4. Step 4: Simplify right side
   2,627.52x = 3,065,510.71
5. Step 5: Solve for x
   x = 3,065,510.71/2,627.52
6. Step 6: Final answer
   x = 1,166.69