Finding the Third Proportional to 443,150 and 687,487

Step by Step Solution

1. Step 1: Write the proportion equation
   443,150 : 687,487 = 687,487 : x
2. Step 2: Convert to fraction form
   443,150/687,487 = 687,487/x
3. Step 3: Cross multiply
   443,150x = 687,487 × 687,487
4. Step 4: Simplify right side
   443,150x = 472,638,375,169
5. Step 5: Solve for x
   x = 472,638,375,169/443,150
6. Step 6: Final answer
   x = 1,066,542.65