Finding the Third Proportional to 663,212 and 1,420,978

Step by Step Solution

1. Step 1: Write the proportion equation
   663,212 : 1,420,978 = 1,420,978 : x
2. Step 2: Convert to fraction form
   663,212/1,420,978 = 1,420,978/x
3. Step 3: Cross multiply
   663,212x = 1,420,978 × 1,420,978
4. Step 4: Simplify right side
   663,212x = 2,019,178,476,484
5. Step 5: Solve for x
   x = 2,019,178,476,484/663,212
6. Step 6: Final answer
   x = 3,044,544.54