Finding the Fourth Proportional to 11.83, 16.31 and 11.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11.83 : 16.31 = 11.59 : x
2. Step 2: Convert to fraction form
   11.83/16.31 = 11.59/x
3. Step 3: Cross multiply
   11.83x = 16.31 × 11.59
4. Step 4: Simplify right side
   11.83x = 188.93
5. Step 5: Solve for x
   x = 188.93/11.83
6. Step 6: Final answer
   x = 15.97