Finding the Fourth Proportional to 2,080.80, 3,117.60 and 1,105.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.80 : 3,117.60 = 1,105.92 : x
2. Step 2: Convert to fraction form
   2,080.80/3,117.60 = 1,105.92/x
3. Step 3: Cross multiply
   2,080.80x = 3,117.60 × 1,105.92
4. Step 4: Simplify right side
   2,080.80x = 3,447,816.19
5. Step 5: Solve for x
   x = 3,447,816.19/2,080.80
6. Step 6: Final answer
   x = 1,656.97