Finding the Fourth Proportional to 2,078.23, 3,123.06 and 1,105.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.23 : 3,123.06 = 1,105.06 : x
2. Step 2: Convert to fraction form
   2,078.23/3,123.06 = 1,105.06/x
3. Step 3: Cross multiply
   2,078.23x = 3,123.06 × 1,105.06
4. Step 4: Simplify right side
   2,078.23x = 3,451,168.68
5. Step 5: Solve for x
   x = 3,451,168.68/2,078.23
6. Step 6: Final answer
   x = 1,660.63