Finding the Fourth Proportional to 2,728.97, 4,093.72 and 1,085.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.97 : 4,093.72 = 1,085.15 : x
2. Step 2: Convert to fraction form
   2,728.97/4,093.72 = 1,085.15/x
3. Step 3: Cross multiply
   2,728.97x = 4,093.72 × 1,085.15
4. Step 4: Simplify right side
   2,728.97x = 4,442,300.26
5. Step 5: Solve for x
   x = 4,442,300.26/2,728.97
6. Step 6: Final answer
   x = 1,627.83