Finding the Third Proportional to 443,079 and 664,456

Step by Step Solution

1. Step 1: Write the proportion equation
   443,079 : 664,456 = 664,456 : x
2. Step 2: Convert to fraction form
   443,079/664,456 = 664,456/x
3. Step 3: Cross multiply
   443,079x = 664,456 × 664,456
4. Step 4: Simplify right side
   443,079x = 441,501,775,936
5. Step 5: Solve for x
   x = 441,501,775,936/443,079
6. Step 6: Final answer
   x = 996,440.31