Finding the Fourth Proportional to 13.37, 19.89 and 13.33

Step by Step Solution

1. Step 1: Write the proportion equation
   13.37 : 19.89 = 13.33 : x
2. Step 2: Convert to fraction form
   13.37/19.89 = 13.33/x
3. Step 3: Cross multiply
   13.37x = 19.89 × 13.33
4. Step 4: Simplify right side
   13.37x = 265.03
5. Step 5: Solve for x
   x = 265.03/13.37
6. Step 6: Final answer
   x = 19.82