Finding the Third Proportional to 55.05 and 85.43

Step by Step Solution

1. Step 1: Write the proportion equation
   55.05 : 85.43 = 85.43 : x
2. Step 2: Convert to fraction form
   55.05/85.43 = 85.43/x
3. Step 3: Cross multiply
   55.05x = 85.43 × 85.43
4. Step 4: Simplify right side
   55.05x = 7,298.23
5. Step 5: Solve for x
   x = 7,298.23/55.05
6. Step 6: Final answer
   x = 132.56