Finding the Third Proportional to 661.50 and 1,443

Step by Step Solution

1. Step 1: Write the proportion equation
   661.50 : 1,443 = 1,443 : x
2. Step 2: Convert to fraction form
   661.50/1,443 = 1,443/x
3. Step 3: Cross multiply
   661.50x = 1,443 × 1,443
4. Step 4: Simplify right side
   661.50x = 2,082,249
5. Step 5: Solve for x
   x = 2,082,249/661.50
6. Step 6: Final answer
   x = 3,147.77