Finding the Third Proportional to 443.94 and 661.31

Step by Step Solution

1. Step 1: Write the proportion equation
   443.94 : 661.31 = 661.31 : x
2. Step 2: Convert to fraction form
   443.94/661.31 = 661.31/x
3. Step 3: Cross multiply
   443.94x = 661.31 × 661.31
4. Step 4: Simplify right side
   443.94x = 437,334.22
5. Step 5: Solve for x
   x = 437,334.22/443.94
6. Step 6: Final answer
   x = 985.13