Finding the Third Proportional to 1,216,638 and 2,647,330

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216,638 : 2,647,330 = 2,647,330 : x
2. Step 2: Convert to fraction form
   1,216,638/2,647,330 = 2,647,330/x
3. Step 3: Cross multiply
   1,216,638x = 2,647,330 × 2,647,330
4. Step 4: Simplify right side
   1,216,638x = 7,008,356,128,900
5. Step 5: Solve for x
   x = 7,008,356,128,900/1,216,638
6. Step 6: Final answer
   x = 5,760,428.43