Finding the Fourth Proportional to 1,452.78, 2,004.72 and 855.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,452.78 : 2,004.72 = 855.18 : x
2. Step 2: Convert to fraction form
   1,452.78/2,004.72 = 855.18/x
3. Step 3: Cross multiply
   1,452.78x = 2,004.72 × 855.18
4. Step 4: Simplify right side
   1,452.78x = 1,714,396.45
5. Step 5: Solve for x
   x = 1,714,396.45/1,452.78
6. Step 6: Final answer
   x = 1,180.08