Finding the Fourth Proportional to 16.31, 24.31 and 15.82

Step by Step Solution

1. Step 1: Write the proportion equation
   16.31 : 24.31 = 15.82 : x
2. Step 2: Convert to fraction form
   16.31/24.31 = 15.82/x
3. Step 3: Cross multiply
   16.31x = 24.31 × 15.82
4. Step 4: Simplify right side
   16.31x = 384.58
5. Step 5: Solve for x
   x = 384.58/16.31
6. Step 6: Final answer
   x = 23.58