Finding the Fourth Proportional to 13.89, 19.15 and 10.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13.89 : 19.15 = 10.24 : x
2. Step 2: Convert to fraction form
   13.89/19.15 = 10.24/x
3. Step 3: Cross multiply
   13.89x = 19.15 × 10.24
4. Step 4: Simplify right side
   13.89x = 196.10
5. Step 5: Solve for x
   x = 196.10/13.89
6. Step 6: Final answer
   x = 14.12