Finding the Third Proportional to 443,349 and 687,896

Step by Step Solution

1. Step 1: Write the proportion equation
   443,349 : 687,896 = 687,896 : x
2. Step 2: Convert to fraction form
   443,349/687,896 = 687,896/x
3. Step 3: Cross multiply
   443,349x = 687,896 × 687,896
4. Step 4: Simplify right side
   443,349x = 473,200,906,816
5. Step 5: Solve for x
   x = 473,200,906,816/443,349
6. Step 6: Final answer
   x = 1,067,332.75