Finding the Third Proportional to 638,066 and 1,401,920

Step by Step Solution

1. Step 1: Write the proportion equation
   638,066 : 1,401,920 = 1,401,920 : x
2. Step 2: Convert to fraction form
   638,066/1,401,920 = 1,401,920/x
3. Step 3: Cross multiply
   638,066x = 1,401,920 × 1,401,920
4. Step 4: Simplify right side
   638,066x = 1,965,379,686,400
5. Step 5: Solve for x
   x = 1,965,379,686,400/638,066
6. Step 6: Final answer
   x = 3,080,213.78