Finding the Fourth Proportional to 964.56, 1,447.50 and 721.56

Step by Step Solution

1. Step 1: Write the proportion equation
   964.56 : 1,447.50 = 721.56 : x
2. Step 2: Convert to fraction form
   964.56/1,447.50 = 721.56/x
3. Step 3: Cross multiply
   964.56x = 1,447.50 × 721.56
4. Step 4: Simplify right side
   964.56x = 1,044,458.10
5. Step 5: Solve for x
   x = 1,044,458.10/964.56
6. Step 6: Final answer
   x = 1,082.83