Finding the Third Proportional to 99,261 and 216,018

Step by Step Solution

1. Step 1: Write the proportion equation
   99,261 : 216,018 = 216,018 : x
2. Step 2: Convert to fraction form
   99,261/216,018 = 216,018/x
3. Step 3: Cross multiply
   99,261x = 216,018 × 216,018
4. Step 4: Simplify right side
   99,261x = 46,663,776,324
5. Step 5: Solve for x
   x = 46,663,776,324/99,261
6. Step 6: Final answer
   x = 470,111.89