Finding the Third Proportional to 99,300 and 216,108

Step by Step Solution

1. Step 1: Write the proportion equation
   99,300 : 216,108 = 216,108 : x
2. Step 2: Convert to fraction form
   99,300/216,108 = 216,108/x
3. Step 3: Cross multiply
   99,300x = 216,108 × 216,108
4. Step 4: Simplify right side
   99,300x = 46,702,667,664
5. Step 5: Solve for x
   x = 46,702,667,664/99,300
6. Step 6: Final answer
   x = 470,318.91