Finding the Third Proportional to 200,034 and 309,636

Step by Step Solution

1. Step 1: Write the proportion equation
   200,034 : 309,636 = 309,636 : x
2. Step 2: Convert to fraction form
   200,034/309,636 = 309,636/x
3. Step 3: Cross multiply
   200,034x = 309,636 × 309,636
4. Step 4: Simplify right side
   200,034x = 95,874,452,496
5. Step 5: Solve for x
   x = 95,874,452,496/200,034
6. Step 6: Final answer
   x = 479,290.78