Finding the Third Proportional to 1,002,915 and 2,188,728

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002,915 : 2,188,728 = 2,188,728 : x
2. Step 2: Convert to fraction form
   1,002,915/2,188,728 = 2,188,728/x
3. Step 3: Cross multiply
   1,002,915x = 2,188,728 × 2,188,728
4. Step 4: Simplify right side
   1,002,915x = 4,790,530,257,984
5. Step 5: Solve for x
   x = 4,790,530,257,984/1,002,915
6. Step 6: Final answer
   x = 4,776,606.45