Finding the Third Proportional to 90.91 and 168.54

Step by Step Solution

1. Step 1: Write the proportion equation
   90.91 : 168.54 = 168.54 : x
2. Step 2: Convert to fraction form
   90.91/168.54 = 168.54/x
3. Step 3: Cross multiply
   90.91x = 168.54 × 168.54
4. Step 4: Simplify right side
   90.91x = 28,405.42
5. Step 5: Solve for x
   x = 28,405.42/90.91
6. Step 6: Final answer
   x = 312.44