Finding the Third Proportional to 200,406 and 300,057

Step by Step Solution

1. Step 1: Write the proportion equation
   200,406 : 300,057 = 300,057 : x
2. Step 2: Convert to fraction form
   200,406/300,057 = 300,057/x
3. Step 3: Cross multiply
   200,406x = 300,057 × 300,057
4. Step 4: Simplify right side
   200,406x = 90,034,203,249
5. Step 5: Solve for x
   x = 90,034,203,249/200,406
6. Step 6: Final answer
   x = 449,259.02