Finding the Fourth Proportional to 964.56, 1,443.48 and 789.20

Step by Step Solution

1. Step 1: Write the proportion equation
   964.56 : 1,443.48 = 789.20 : x
2. Step 2: Convert to fraction form
   964.56/1,443.48 = 789.20/x
3. Step 3: Cross multiply
   964.56x = 1,443.48 × 789.20
4. Step 4: Simplify right side
   964.56x = 1,139,194.42
5. Step 5: Solve for x
   x = 1,139,194.42/964.56
6. Step 6: Final answer
   x = 1,181.05