Finding the Third Proportional to 3,919,224 and 8,398,320

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919,224 : 8,398,320 = 8,398,320 : x
2. Step 2: Convert to fraction form
   3,919,224/8,398,320 = 8,398,320/x
3. Step 3: Cross multiply
   3,919,224x = 8,398,320 × 8,398,320
4. Step 4: Simplify right side
   3,919,224x = 70,531,778,822,400
5. Step 5: Solve for x
   x = 70,531,778,822,400/3,919,224
6. Step 6: Final answer
   x = 17,996,363.27