Finding the Third Proportional to 200,470 and 311,418

Step by Step Solution

1. Step 1: Write the proportion equation
   200,470 : 311,418 = 311,418 : x
2. Step 2: Convert to fraction form
   200,470/311,418 = 311,418/x
3. Step 3: Cross multiply
   200,470x = 311,418 × 311,418
4. Step 4: Simplify right side
   200,470x = 96,981,170,724
5. Step 5: Solve for x
   x = 96,981,170,724/200,470
6. Step 6: Final answer
   x = 483,769.00