Finding the Fourth Proportional to 10.55, 15.82 and 5.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10.55 : 15.82 = 5.49 : x
2. Step 2: Convert to fraction form
   10.55/15.82 = 5.49/x
3. Step 3: Cross multiply
   10.55x = 15.82 × 5.49
4. Step 4: Simplify right side
   10.55x = 86.83
5. Step 5: Solve for x
   x = 86.83/10.55
6. Step 6: Final answer
   x = 8.23