Finding the Fourth Proportional to 23.72, 32.71 and 15.83

Step by Step Solution

1. Step 1: Write the proportion equation
   23.72 : 32.71 = 15.83 : x
2. Step 2: Convert to fraction form
   23.72/32.71 = 15.83/x
3. Step 3: Cross multiply
   23.72x = 32.71 × 15.83
4. Step 4: Simplify right side
   23.72x = 517.80
5. Step 5: Solve for x
   x = 517.80/23.72
6. Step 6: Final answer
   x = 21.83