Finding the Third Proportional to 298,212 and 443,268

Step by Step Solution

1. Step 1: Write the proportion equation
   298,212 : 443,268 = 443,268 : x
2. Step 2: Convert to fraction form
   298,212/443,268 = 443,268/x
3. Step 3: Cross multiply
   298,212x = 443,268 × 443,268
4. Step 4: Simplify right side
   298,212x = 196,486,519,824
5. Step 5: Solve for x
   x = 196,486,519,824/298,212
6. Step 6: Final answer
   x = 658,882.00