Finding the Fourth Proportional to 2,086.28, 2,879.04 and 1,154.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.28 : 2,879.04 = 1,154.78 : x
2. Step 2: Convert to fraction form
   2,086.28/2,879.04 = 1,154.78/x
3. Step 3: Cross multiply
   2,086.28x = 2,879.04 × 1,154.78
4. Step 4: Simplify right side
   2,086.28x = 3,324,657.81
5. Step 5: Solve for x
   x = 3,324,657.81/2,086.28
6. Step 6: Final answer
   x = 1,593.58