Finding the Third Proportional to 4,659,568 and 9,966,816

Step by Step Solution

1. Step 1: Write the proportion equation
   4,659,568 : 9,966,816 = 9,966,816 : x
2. Step 2: Convert to fraction form
   4,659,568/9,966,816 = 9,966,816/x
3. Step 3: Cross multiply
   4,659,568x = 9,966,816 × 9,966,816
4. Step 4: Simplify right side
   4,659,568x = 99,337,421,177,856
5. Step 5: Solve for x
   x = 99,337,421,177,856/4,659,568
6. Step 6: Final answer
   x = 21,319,019.53