Finding the Third Proportional to 646,604 and 1,396,456

Step by Step Solution

1. Step 1: Write the proportion equation
   646,604 : 1,396,456 = 1,396,456 : x
2. Step 2: Convert to fraction form
   646,604/1,396,456 = 1,396,456/x
3. Step 3: Cross multiply
   646,604x = 1,396,456 × 1,396,456
4. Step 4: Simplify right side
   646,604x = 1,950,089,359,936
5. Step 5: Solve for x
   x = 1,950,089,359,936/646,604
6. Step 6: Final answer
   x = 3,015,894.36