Finding the Fourth Proportional to 2,724.47, 4,086.86 and 776.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,724.47 : 4,086.86 = 776.82 : x
2. Step 2: Convert to fraction form
   2,724.47/4,086.86 = 776.82/x
3. Step 3: Cross multiply
   2,724.47x = 4,086.86 × 776.82
4. Step 4: Simplify right side
   2,724.47x = 3,174,766.03
5. Step 5: Solve for x
   x = 3,174,766.03/2,724.47
6. Step 6: Final answer
   x = 1,165.28