Finding the Third Proportional to 443,426 and 676,210

Step by Step Solution

1. Step 1: Write the proportion equation
   443,426 : 676,210 = 676,210 : x
2. Step 2: Convert to fraction form
   443,426/676,210 = 676,210/x
3. Step 3: Cross multiply
   443,426x = 676,210 × 676,210
4. Step 4: Simplify right side
   443,426x = 457,259,964,100
5. Step 5: Solve for x
   x = 457,259,964,100/443,426
6. Step 6: Final answer
   x = 1,031,197.91