Finding the Third Proportional to 443,359 and 687,910

Step by Step Solution

1. Step 1: Write the proportion equation
   443,359 : 687,910 = 687,910 : x
2. Step 2: Convert to fraction form
   443,359/687,910 = 687,910/x
3. Step 3: Cross multiply
   443,359x = 687,910 × 687,910
4. Step 4: Simplify right side
   443,359x = 473,220,168,100
5. Step 5: Solve for x
   x = 473,220,168,100/443,359
6. Step 6: Final answer
   x = 1,067,352.12