Finding the Third Proportional to 638,064 and 1,401,918

Step by Step Solution

1. Step 1: Write the proportion equation
   638,064 : 1,401,918 = 1,401,918 : x
2. Step 2: Convert to fraction form
   638,064/1,401,918 = 1,401,918/x
3. Step 3: Cross multiply
   638,064x = 1,401,918 × 1,401,918
4. Step 4: Simplify right side
   638,064x = 1,965,374,078,724
5. Step 5: Solve for x
   x = 1,965,374,078,724/638,064
6. Step 6: Final answer
   x = 3,080,214.65