Finding the Third Proportional to 443,430 and 676,216

Step by Step Solution

1. Step 1: Write the proportion equation
   443,430 : 676,216 = 676,216 : x
2. Step 2: Convert to fraction form
   443,430/676,216 = 676,216/x
3. Step 3: Cross multiply
   443,430x = 676,216 × 676,216
4. Step 4: Simplify right side
   443,430x = 457,268,078,656
5. Step 5: Solve for x
   x = 457,268,078,656/443,430
6. Step 6: Final answer
   x = 1,031,206.91