Finding the Fourth Proportional to 2,728.54, 4,093.17 and 780.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.54 : 4,093.17 = 780.82 : x
2. Step 2: Convert to fraction form
   2,728.54/4,093.17 = 780.82/x
3. Step 3: Cross multiply
   2,728.54x = 4,093.17 × 780.82
4. Step 4: Simplify right side
   2,728.54x = 3,196,029.00
5. Step 5: Solve for x
   x = 3,196,029.00/2,728.54
6. Step 6: Final answer
   x = 1,171.33