Finding the Third Proportional to 1,212,768 and 1,818,999

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212,768 : 1,818,999 = 1,818,999 : x
2. Step 2: Convert to fraction form
   1,212,768/1,818,999 = 1,818,999/x
3. Step 3: Cross multiply
   1,212,768x = 1,818,999 × 1,818,999
4. Step 4: Simplify right side
   1,212,768x = 3,308,757,362,001
5. Step 5: Solve for x
   x = 3,308,757,362,001/1,212,768
6. Step 6: Final answer
   x = 2,728,269.02