Finding the Third Proportional to 1,521,398 and 3,212,563

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521,398 : 3,212,563 = 3,212,563 : x
2. Step 2: Convert to fraction form
   1,521,398/3,212,563 = 3,212,563/x
3. Step 3: Cross multiply
   1,521,398x = 3,212,563 × 3,212,563
4. Step 4: Simplify right side
   1,521,398x = 10,320,561,028,969
5. Step 5: Solve for x
   x = 10,320,561,028,969/1,521,398
6. Step 6: Final answer
   x = 6,783,603.65