Finding the Third Proportional to 200.81 and 300.28

Step by Step Solution

1. Step 1: Write the proportion equation
   200.81 : 300.28 = 300.28 : x
2. Step 2: Convert to fraction form
   200.81/300.28 = 300.28/x
3. Step 3: Cross multiply
   200.81x = 300.28 × 300.28
4. Step 4: Simplify right side
   200.81x = 90,168.83
5. Step 5: Solve for x
   x = 90,168.83/200.81
6. Step 6: Final answer
   x = 449.02