Finding the Fourth Proportional to 2,080.37, 3,121.77 and 1,106.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.37 : 3,121.77 = 1,106.55 : x
2. Step 2: Convert to fraction form
   2,080.37/3,121.77 = 1,106.55/x
3. Step 3: Cross multiply
   2,080.37x = 3,121.77 × 1,106.55
4. Step 4: Simplify right side
   2,080.37x = 3,454,394.59
5. Step 5: Solve for x
   x = 3,454,394.59/2,080.37
6. Step 6: Final answer
   x = 1,660.48