Finding the Third Proportional to 99,282 and 216,036

Step by Step Solution

1. Step 1: Write the proportion equation
   99,282 : 216,036 = 216,036 : x
2. Step 2: Convert to fraction form
   99,282/216,036 = 216,036/x
3. Step 3: Cross multiply
   99,282x = 216,036 × 216,036
4. Step 4: Simplify right side
   99,282x = 46,671,553,296
5. Step 5: Solve for x
   x = 46,671,553,296/99,282
6. Step 6: Final answer
   x = 470,090.78