Finding the Third Proportional to 443,470 and 664,521

Step by Step Solution

1. Step 1: Write the proportion equation
   443,470 : 664,521 = 664,521 : x
2. Step 2: Convert to fraction form
   443,470/664,521 = 664,521/x
3. Step 3: Cross multiply
   443,470x = 664,521 × 664,521
4. Step 4: Simplify right side
   443,470x = 441,588,159,441
5. Step 5: Solve for x
   x = 441,588,159,441/443,470
6. Step 6: Final answer
   x = 995,756.55