Finding the Third Proportional to 99,342 and 216,530

Step by Step Solution

1. Step 1: Write the proportion equation
   99,342 : 216,530 = 216,530 : x
2. Step 2: Convert to fraction form
   99,342/216,530 = 216,530/x
3. Step 3: Cross multiply
   99,342x = 216,530 × 216,530
4. Step 4: Simplify right side
   99,342x = 46,885,240,900
5. Step 5: Solve for x
   x = 46,885,240,900/99,342
6. Step 6: Final answer
   x = 471,957.89