Finding the Fourth Proportional to 2,081.68, 3,119.76 and 1,105.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.68 : 3,119.76 = 1,105.68 : x
2. Step 2: Convert to fraction form
   2,081.68/3,119.76 = 1,105.68/x
3. Step 3: Cross multiply
   2,081.68x = 3,119.76 × 1,105.68
4. Step 4: Simplify right side
   2,081.68x = 3,449,456.24
5. Step 5: Solve for x
   x = 3,449,456.24/2,081.68
6. Step 6: Final answer
   x = 1,657.05