Finding the Fourth Proportional to 2,078.81, 3,119.56 and 1,105.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.81 : 3,119.56 = 1,105.59 : x
2. Step 2: Convert to fraction form
   2,078.81/3,119.56 = 1,105.59/x
3. Step 3: Cross multiply
   2,078.81x = 3,119.56 × 1,105.59
4. Step 4: Simplify right side
   2,078.81x = 3,448,948.81
5. Step 5: Solve for x
   x = 3,448,948.81/2,078.81
6. Step 6: Final answer
   x = 1,659.10