Finding the Third Proportional to 443,040 and 687,294

Step by Step Solution

1. Step 1: Write the proportion equation
   443,040 : 687,294 = 687,294 : x
2. Step 2: Convert to fraction form
   443,040/687,294 = 687,294/x
3. Step 3: Cross multiply
   443,040x = 687,294 × 687,294
4. Step 4: Simplify right side
   443,040x = 472,373,042,436
5. Step 5: Solve for x
   x = 472,373,042,436/443,040
6. Step 6: Final answer
   x = 1,066,208.56