Finding the Third Proportional to 406,830 and 850,839

Step by Step Solution

1. Step 1: Write the proportion equation
   406,830 : 850,839 = 850,839 : x
2. Step 2: Convert to fraction form
   406,830/850,839 = 850,839/x
3. Step 3: Cross multiply
   406,830x = 850,839 × 850,839
4. Step 4: Simplify right side
   406,830x = 723,927,003,921
5. Step 5: Solve for x
   x = 723,927,003,921/406,830
6. Step 6: Final answer
   x = 1,779,433.68