Finding the Third Proportional to 406,806 and 629,892

Step by Step Solution

1. Step 1: Write the proportion equation
   406,806 : 629,892 = 629,892 : x
2. Step 2: Convert to fraction form
   406,806/629,892 = 629,892/x
3. Step 3: Cross multiply
   406,806x = 629,892 × 629,892
4. Step 4: Simplify right side
   406,806x = 396,763,931,664
5. Step 5: Solve for x
   x = 396,763,931,664/406,806
6. Step 6: Final answer
   x = 975,314.85