Finding the Fourth Proportional to 10.72, 15.96 and 10.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10.72 : 15.96 = 10.47 : x
2. Step 2: Convert to fraction form
   10.72/15.96 = 10.47/x
3. Step 3: Cross multiply
   10.72x = 15.96 × 10.47
4. Step 4: Simplify right side
   10.72x = 167.10
5. Step 5: Solve for x
   x = 167.10/10.72
6. Step 6: Final answer
   x = 15.59