Finding the Fourth Proportional to 21.72, 32.58 and 5.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21.72 : 32.58 = 5.69 : x
2. Step 2: Convert to fraction form
   21.72/32.58 = 5.69/x
3. Step 3: Cross multiply
   21.72x = 32.58 × 5.69
4. Step 4: Simplify right side
   21.72x = 185.30
5. Step 5: Solve for x
   x = 185.30/21.72
6. Step 6: Final answer
   x = 8.53