Finding the Third Proportional to 200,078 and 308,436

Step by Step Solution

1. Step 1: Write the proportion equation
   200,078 : 308,436 = 308,436 : x
2. Step 2: Convert to fraction form
   200,078/308,436 = 308,436/x
3. Step 3: Cross multiply
   200,078x = 308,436 × 308,436
4. Step 4: Simplify right side
   200,078x = 95,132,766,096
5. Step 5: Solve for x
   x = 95,132,766,096/200,078
6. Step 6: Final answer
   x = 475,478.39