Finding the Third Proportional to 498,721 and 789,834

Step by Step Solution

1. Step 1: Write the proportion equation
   498,721 : 789,834 = 789,834 : x
2. Step 2: Convert to fraction form
   498,721/789,834 = 789,834/x
3. Step 3: Cross multiply
   498,721x = 789,834 × 789,834
4. Step 4: Simplify right side
   498,721x = 623,837,747,556
5. Step 5: Solve for x
   x = 623,837,747,556/498,721
6. Step 6: Final answer
   x = 1,250,875.23