Finding the Fourth Proportional to 2,039.78, 2,814.89 and 1,108.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.78 : 2,814.89 = 1,108.28 : x
2. Step 2: Convert to fraction form
   2,039.78/2,814.89 = 1,108.28/x
3. Step 3: Cross multiply
   2,039.78x = 2,814.89 × 1,108.28
4. Step 4: Simplify right side
   2,039.78x = 3,119,687.79
5. Step 5: Solve for x
   x = 3,119,687.79/2,039.78
6. Step 6: Final answer
   x = 1,529.42