Finding the Third Proportional to 1,212,424 and 1,818,809

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212,424 : 1,818,809 = 1,818,809 : x
2. Step 2: Convert to fraction form
   1,212,424/1,818,809 = 1,818,809/x
3. Step 3: Cross multiply
   1,212,424x = 1,818,809 × 1,818,809
4. Step 4: Simplify right side
   1,212,424x = 3,308,066,178,481
5. Step 5: Solve for x
   x = 3,308,066,178,481/1,212,424
6. Step 6: Final answer
   x = 2,728,473.02