Finding the Third Proportional to 2.55 and 5.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2.55 : 5.56 = 5.56 : x
2. Step 2: Convert to fraction form
   2.55/5.56 = 5.56/x
3. Step 3: Cross multiply
   2.55x = 5.56 × 5.56
4. Step 4: Simplify right side
   2.55x = 30.87
5. Step 5: Solve for x
   x = 30.87/2.55
6. Step 6: Final answer
   x = 12.09