Finding the Third Proportional to 1,021,920 and 2,109,440

Step by Step Solution

1. Step 1: Write the proportion equation
   1,021,920 : 2,109,440 = 2,109,440 : x
2. Step 2: Convert to fraction form
   1,021,920/2,109,440 = 2,109,440/x
3. Step 3: Cross multiply
   1,021,920x = 2,109,440 × 2,109,440
4. Step 4: Simplify right side
   1,021,920x = 4,449,737,113,600
5. Step 5: Solve for x
   x = 4,449,737,113,600/1,021,920
6. Step 6: Final answer
   x = 4,354,291.05