Finding the Third Proportional to 638,288 and 1,382,956

Step by Step Solution

1. Step 1: Write the proportion equation
   638,288 : 1,382,956 = 1,382,956 : x
2. Step 2: Convert to fraction form
   638,288/1,382,956 = 1,382,956/x
3. Step 3: Cross multiply
   638,288x = 1,382,956 × 1,382,956
4. Step 4: Simplify right side
   638,288x = 1,912,567,297,936
5. Step 5: Solve for x
   x = 1,912,567,297,936/638,288
6. Step 6: Final answer
   x = 2,996,401.78