Finding the Third Proportional to 768,648 and 1,221,401

Step by Step Solution

1. Step 1: Write the proportion equation
   768,648 : 1,221,401 = 1,221,401 : x
2. Step 2: Convert to fraction form
   768,648/1,221,401 = 1,221,401/x
3. Step 3: Cross multiply
   768,648x = 1,221,401 × 1,221,401
4. Step 4: Simplify right side
   768,648x = 1,491,820,402,801
5. Step 5: Solve for x
   x = 1,491,820,402,801/768,648
6. Step 6: Final answer
   x = 1,940,836.90