Finding the Third Proportional to 1,021,918 and 2,109,436

Step by Step Solution

1. Step 1: Write the proportion equation
   1,021,918 : 2,109,436 = 2,109,436 : x
2. Step 2: Convert to fraction form
   1,021,918/2,109,436 = 2,109,436/x
3. Step 3: Cross multiply
   1,021,918x = 2,109,436 × 2,109,436
4. Step 4: Simplify right side
   1,021,918x = 4,449,720,238,096
5. Step 5: Solve for x
   x = 4,449,720,238,096/1,021,918
6. Step 6: Final answer
   x = 4,354,283.06