Finding the Fourth Proportional to 11.48, 15.86 and 10.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11.48 : 15.86 = 10.55 : x
2. Step 2: Convert to fraction form
   11.48/15.86 = 10.55/x
3. Step 3: Cross multiply
   11.48x = 15.86 × 10.55
4. Step 4: Simplify right side
   11.48x = 167.39
5. Step 5: Solve for x
   x = 167.39/11.48
6. Step 6: Final answer
   x = 14.59