Finding the Fourth Proportional to 21.76, 32.69 and 10.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21.76 : 32.69 = 10.37 : x
2. Step 2: Convert to fraction form
   21.76/32.69 = 10.37/x
3. Step 3: Cross multiply
   21.76x = 32.69 × 10.37
4. Step 4: Simplify right side
   21.76x = 338.86
5. Step 5: Solve for x
   x = 338.86/21.76
6. Step 6: Final answer
   x = 15.58