Finding the Third Proportional to 408,082 and 621,150

Step by Step Solution

1. Step 1: Write the proportion equation
   408,082 : 621,150 = 621,150 : x
2. Step 2: Convert to fraction form
   408,082/621,150 = 621,150/x
3. Step 3: Cross multiply
   408,082x = 621,150 × 621,150
4. Step 4: Simplify right side
   408,082x = 385,827,322,500
5. Step 5: Solve for x
   x = 385,827,322,500/408,082
6. Step 6: Final answer
   x = 945,465.18