Finding the Third Proportional to 4,128,208 and 8,945,320

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128,208 : 8,945,320 = 8,945,320 : x
2. Step 2: Convert to fraction form
   4,128,208/8,945,320 = 8,945,320/x
3. Step 3: Cross multiply
   4,128,208x = 8,945,320 × 8,945,320
4. Step 4: Simplify right side
   4,128,208x = 80,018,749,902,400
5. Step 5: Solve for x
   x = 80,018,749,902,400/4,128,208
6. Step 6: Final answer
   x = 19,383,410.41