Finding the Third Proportional to 638,772 and 1,382,736

Step by Step Solution

1. Step 1: Write the proportion equation
   638,772 : 1,382,736 = 1,382,736 : x
2. Step 2: Convert to fraction form
   638,772/1,382,736 = 1,382,736/x
3. Step 3: Cross multiply
   638,772x = 1,382,736 × 1,382,736
4. Step 4: Simplify right side
   638,772x = 1,911,958,845,696
5. Step 5: Solve for x
   x = 1,911,958,845,696/638,772
6. Step 6: Final answer
   x = 2,993,178.86