Finding the Fourth Proportional to 2,080.27, 3,121.61 and 1,155.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.27 : 3,121.61 = 1,155.75 : x
2. Step 2: Convert to fraction form
   2,080.27/3,121.61 = 1,155.75/x
3. Step 3: Cross multiply
   2,080.27x = 3,121.61 × 1,155.75
4. Step 4: Simplify right side
   2,080.27x = 3,607,812.46
5. Step 5: Solve for x
   x = 3,607,812.46/2,080.27
6. Step 6: Final answer
   x = 1,734.30