Finding the Fourth Proportional to 1,052.56, 1,452.72 and 773.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,052.56 : 1,452.72 = 773.20 : x
2. Step 2: Convert to fraction form
   1,052.56/1,452.72 = 773.20/x
3. Step 3: Cross multiply
   1,052.56x = 1,452.72 × 773.20
4. Step 4: Simplify right side
   1,052.56x = 1,123,243.10
5. Step 5: Solve for x
   x = 1,123,243.10/1,052.56
6. Step 6: Final answer
   x = 1,067.15