Finding the Fourth Proportional to 1,452.12, 2,003.78 and 862.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,452.12 : 2,003.78 = 862.56 : x
2. Step 2: Convert to fraction form
   1,452.12/2,003.78 = 862.56/x
3. Step 3: Cross multiply
   1,452.12x = 2,003.78 × 862.56
4. Step 4: Simplify right side
   1,452.12x = 1,728,380.48
5. Step 5: Solve for x
   x = 1,728,380.48/1,452.12
6. Step 6: Final answer
   x = 1,190.25