Finding the Third Proportional to 300,836 and 648,693

Step by Step Solution

1. Step 1: Write the proportion equation
   300,836 : 648,693 = 648,693 : x
2. Step 2: Convert to fraction form
   300,836/648,693 = 648,693/x
3. Step 3: Cross multiply
   300,836x = 648,693 × 648,693
4. Step 4: Simplify right side
   300,836x = 420,802,608,249
5. Step 5: Solve for x
   x = 420,802,608,249/300,836
6. Step 6: Final answer
   x = 1,398,777.43