Finding the Third Proportional to 90.94 and 198.81

Step by Step Solution

1. Step 1: Write the proportion equation
   90.94 : 198.81 = 198.81 : x
2. Step 2: Convert to fraction form
   90.94/198.81 = 198.81/x
3. Step 3: Cross multiply
   90.94x = 198.81 × 198.81
4. Step 4: Simplify right side
   90.94x = 39,526.41
5. Step 5: Solve for x
   x = 39,526.41/90.94
6. Step 6: Final answer
   x = 434.65