Finding the Third Proportional to 85.43 and 120.55

Step by Step Solution

1. Step 1: Write the proportion equation
   85.43 : 120.55 = 120.55 : x
2. Step 2: Convert to fraction form
   85.43/120.55 = 120.55/x
3. Step 3: Cross multiply
   85.43x = 120.55 × 120.55
4. Step 4: Simplify right side
   85.43x = 14,532.49
5. Step 5: Solve for x
   x = 14,532.49/85.43
6. Step 6: Final answer
   x = 170.11