Finding the Third Proportional to 85.56 and 130.56

Step by Step Solution

1. Step 1: Write the proportion equation
   85.56 : 130.56 = 130.56 : x
2. Step 2: Convert to fraction form
   85.56/130.56 = 130.56/x
3. Step 3: Cross multiply
   85.56x = 130.56 × 130.56
4. Step 4: Simplify right side
   85.56x = 17,046.57
5. Step 5: Solve for x
   x = 17,046.57/85.56
6. Step 6: Final answer
   x = 199.23