Finding the Fourth Proportional to 2,722.28, 4,081.59 and 1,078.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,722.28 : 4,081.59 = 1,078.38 : x
2. Step 2: Convert to fraction form
   2,722.28/4,081.59 = 1,078.38/x
3. Step 3: Cross multiply
   2,722.28x = 4,081.59 × 1,078.38
4. Step 4: Simplify right side
   2,722.28x = 4,401,505.02
5. Step 5: Solve for x
   x = 4,401,505.02/2,722.28
6. Step 6: Final answer
   x = 1,616.85