Finding the Third Proportional to 91,230 and 200,439

Step by Step Solution

1. Step 1: Write the proportion equation
   91,230 : 200,439 = 200,439 : x
2. Step 2: Convert to fraction form
   91,230/200,439 = 200,439/x
3. Step 3: Cross multiply
   91,230x = 200,439 × 200,439
4. Step 4: Simplify right side
   91,230x = 40,175,792,721
5. Step 5: Solve for x
   x = 40,175,792,721/91,230
6. Step 6: Final answer
   x = 440,379.18