Finding the Fourth Proportional to 11.31, 16.83 and 10.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11.31 : 16.83 = 10.59 : x
2. Step 2: Convert to fraction form
   11.31/16.83 = 10.59/x
3. Step 3: Cross multiply
   11.31x = 16.83 × 10.59
4. Step 4: Simplify right side
   11.31x = 178.23
5. Step 5: Solve for x
   x = 178.23/11.31
6. Step 6: Final answer
   x = 15.76