Finding the Fourth Proportional to 11.02, 15.22 and 10.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11.02 : 15.22 = 10.42 : x
2. Step 2: Convert to fraction form
   11.02/15.22 = 10.42/x
3. Step 3: Cross multiply
   11.02x = 15.22 × 10.42
4. Step 4: Simplify right side
   11.02x = 158.59
5. Step 5: Solve for x
   x = 158.59/11.02
6. Step 6: Final answer
   x = 14.39