Finding the Fourth Proportional to 11.41, 15.72 and 7.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11.41 : 15.72 = 7.31 : x
2. Step 2: Convert to fraction form
   11.41/15.72 = 7.31/x
3. Step 3: Cross multiply
   11.41x = 15.72 × 7.31
4. Step 4: Simplify right side
   11.41x = 114.83
5. Step 5: Solve for x
   x = 114.83/11.41
6. Step 6: Final answer
   x = 10.07