Finding the Fourth Proportional to 2,180.42, 3,268.96 and 1,085.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.42 : 3,268.96 = 1,085.55 : x
2. Step 2: Convert to fraction form
   2,180.42/3,268.96 = 1,085.55/x
3. Step 3: Cross multiply
   2,180.42x = 3,268.96 × 1,085.55
4. Step 4: Simplify right side
   2,180.42x = 3,548,622.94
5. Step 5: Solve for x
   x = 3,548,622.94/2,180.42
6. Step 6: Final answer
   x = 1,627.50