Finding the Third Proportional to 0.42 and 1.10

Step by Step Solution

1. Step 1: Write the proportion equation
   0.42 : 1.10 = 1.10 : x
2. Step 2: Convert to fraction form
   0.42/1.10 = 1.10/x
3. Step 3: Cross multiply
   0.42x = 1.10 × 1.10
4. Step 4: Simplify right side
   0.42x = 1.21
5. Step 5: Solve for x
   x = 1.21/0.42
6. Step 6: Final answer
   x = 2.89