Finding the Third Proportional to 443,134 and 687,462

Step by Step Solution

1. Step 1: Write the proportion equation
   443,134 : 687,462 = 687,462 : x
2. Step 2: Convert to fraction form
   443,134/687,462 = 687,462/x
3. Step 3: Cross multiply
   443,134x = 687,462 × 687,462
4. Step 4: Simplify right side
   443,134x = 472,604,001,444
5. Step 5: Solve for x
   x = 472,604,001,444/443,134
6. Step 6: Final answer
   x = 1,066,503.59