Finding the Third Proportional to 200,912 and 303,406

Step by Step Solution

1. Step 1: Write the proportion equation
   200,912 : 303,406 = 303,406 : x
2. Step 2: Convert to fraction form
   200,912/303,406 = 303,406/x
3. Step 3: Cross multiply
   200,912x = 303,406 × 303,406
4. Step 4: Simplify right side
   200,912x = 92,055,200,836
5. Step 5: Solve for x
   x = 92,055,200,836/200,912
6. Step 6: Final answer
   x = 458,186.67