Finding the Third Proportional to 198,900 and 300,270

Step by Step Solution

1. Step 1: Write the proportion equation
   198,900 : 300,270 = 300,270 : x
2. Step 2: Convert to fraction form
   198,900/300,270 = 300,270/x
3. Step 3: Cross multiply
   198,900x = 300,270 × 300,270
4. Step 4: Simplify right side
   198,900x = 90,162,072,900
5. Step 5: Solve for x
   x = 90,162,072,900/198,900
6. Step 6: Final answer
   x = 453,303.53