Finding the Third Proportional to 198,892 and 300,258

Step by Step Solution

1. Step 1: Write the proportion equation
   198,892 : 300,258 = 300,258 : x
2. Step 2: Convert to fraction form
   198,892/300,258 = 300,258/x
3. Step 3: Cross multiply
   198,892x = 300,258 × 300,258
4. Step 4: Simplify right side
   198,892x = 90,154,866,564
5. Step 5: Solve for x
   x = 90,154,866,564/198,892
6. Step 6: Final answer
   x = 453,285.53