Finding the Third Proportional to 638,504 and 1,396,672

Step by Step Solution

1. Step 1: Write the proportion equation
   638,504 : 1,396,672 = 1,396,672 : x
2. Step 2: Convert to fraction form
   638,504/1,396,672 = 1,396,672/x
3. Step 3: Cross multiply
   638,504x = 1,396,672 × 1,396,672
4. Step 4: Simplify right side
   638,504x = 1,950,692,675,584
5. Step 5: Solve for x
   x = 1,950,692,675,584/638,504
6. Step 6: Final answer
   x = 3,055,098.60