Finding the Third Proportional to 878,663 and 1,809,801

Step by Step Solution

1. Step 1: Write the proportion equation
   878,663 : 1,809,801 = 1,809,801 : x
2. Step 2: Convert to fraction form
   878,663/1,809,801 = 1,809,801/x
3. Step 3: Cross multiply
   878,663x = 1,809,801 × 1,809,801
4. Step 4: Simplify right side
   878,663x = 3,275,379,659,601
5. Step 5: Solve for x
   x = 3,275,379,659,601/878,663
6. Step 6: Final answer
   x = 3,727,685.88