Finding the Fourth Proportional to 11.98, 16.53 and 7.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11.98 : 16.53 = 7.31 : x
2. Step 2: Convert to fraction form
   11.98/16.53 = 7.31/x
3. Step 3: Cross multiply
   11.98x = 16.53 × 7.31
4. Step 4: Simplify right side
   11.98x = 120.85
5. Step 5: Solve for x
   x = 120.85/11.98
6. Step 6: Final answer
   x = 10.09