Finding the Third Proportional to 400,662 and 599,721

Step by Step Solution

1. Step 1: Write the proportion equation
   400,662 : 599,721 = 599,721 : x
2. Step 2: Convert to fraction form
   400,662/599,721 = 599,721/x
3. Step 3: Cross multiply
   400,662x = 599,721 × 599,721
4. Step 4: Simplify right side
   400,662x = 359,665,277,841
5. Step 5: Solve for x
   x = 359,665,277,841/400,662
6. Step 6: Final answer
   x = 897,677.54