Finding the Third Proportional to 99,256 and 216,007

Step by Step Solution

1. Step 1: Write the proportion equation
   99,256 : 216,007 = 216,007 : x
2. Step 2: Convert to fraction form
   99,256/216,007 = 216,007/x
3. Step 3: Cross multiply
   99,256x = 216,007 × 216,007
4. Step 4: Simplify right side
   99,256x = 46,659,024,049
5. Step 5: Solve for x
   x = 46,659,024,049/99,256
6. Step 6: Final answer
   x = 470,087.69