Finding the Third Proportional to 4,659,270 and 9,966,256

Step by Step Solution

1. Step 1: Write the proportion equation
   4,659,270 : 9,966,256 = 9,966,256 : x
2. Step 2: Convert to fraction form
   4,659,270/9,966,256 = 9,966,256/x
3. Step 3: Cross multiply
   4,659,270x = 9,966,256 × 9,966,256
4. Step 4: Simplify right side
   4,659,270x = 99,326,258,657,536
5. Step 5: Solve for x
   x = 99,326,258,657,536/4,659,270
6. Step 6: Final answer
   x = 21,317,987.29