Finding the Third Proportional to 198.91 and 300.59

Step by Step Solution

1. Step 1: Write the proportion equation
   198.91 : 300.59 = 300.59 : x
2. Step 2: Convert to fraction form
   198.91/300.59 = 300.59/x
3. Step 3: Cross multiply
   198.91x = 300.59 × 300.59
4. Step 4: Simplify right side
   198.91x = 90,351.91
5. Step 5: Solve for x
   x = 90,351.91/198.91
6. Step 6: Final answer
   x = 454.23