Finding the Third Proportional to 443,156 and 687,496

Step by Step Solution

1. Step 1: Write the proportion equation
   443,156 : 687,496 = 687,496 : x
2. Step 2: Convert to fraction form
   443,156/687,496 = 687,496/x
3. Step 3: Cross multiply
   443,156x = 687,496 × 687,496
4. Step 4: Simplify right side
   443,156x = 472,650,750,016
5. Step 5: Solve for x
   x = 472,650,750,016/443,156
6. Step 6: Final answer
   x = 1,066,556.13