Finding the Third Proportional to 2,155,920 and 4,694,328

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155,920 : 4,694,328 = 4,694,328 : x
2. Step 2: Convert to fraction form
   2,155,920/4,694,328 = 4,694,328/x
3. Step 3: Cross multiply
   2,155,920x = 4,694,328 × 4,694,328
4. Step 4: Simplify right side
   2,155,920x = 22,036,715,371,584
5. Step 5: Solve for x
   x = 22,036,715,371,584/2,155,920
6. Step 6: Final answer
   x = 10,221,490.30