Finding the Third Proportional to 99,262 and 216,020

Step by Step Solution

1. Step 1: Write the proportion equation
   99,262 : 216,020 = 216,020 : x
2. Step 2: Convert to fraction form
   99,262/216,020 = 216,020/x
3. Step 3: Cross multiply
   99,262x = 216,020 × 216,020
4. Step 4: Simplify right side
   99,262x = 46,664,640,400
5. Step 5: Solve for x
   x = 46,664,640,400/99,262
6. Step 6: Final answer
   x = 470,115.86