Finding the Third Proportional to 150,436 and 324,380

Step by Step Solution

1. Step 1: Write the proportion equation
   150,436 : 324,380 = 324,380 : x
2. Step 2: Convert to fraction form
   150,436/324,380 = 324,380/x
3. Step 3: Cross multiply
   150,436x = 324,380 × 324,380
4. Step 4: Simplify right side
   150,436x = 105,222,384,400
5. Step 5: Solve for x
   x = 105,222,384,400/150,436
6. Step 6: Final answer
   x = 699,449.50