Finding the Third Proportional to 90.38 and 200.91

Step by Step Solution

1. Step 1: Write the proportion equation
   90.38 : 200.91 = 200.91 : x
2. Step 2: Convert to fraction form
   90.38/200.91 = 200.91/x
3. Step 3: Cross multiply
   90.38x = 200.91 × 200.91
4. Step 4: Simplify right side
   90.38x = 40,363.32
5. Step 5: Solve for x
   x = 40,363.32/90.38
6. Step 6: Final answer
   x = 446.62