Finding the Fourth Proportional to 69.91, 104.86 and 21.82

Step by Step Solution

1. Step 1: Write the proportion equation
   69.91 : 104.86 = 21.82 : x
2. Step 2: Convert to fraction form
   69.91/104.86 = 21.82/x
3. Step 3: Cross multiply
   69.91x = 104.86 × 21.82
4. Step 4: Simplify right side
   69.91x = 2,287.52
5. Step 5: Solve for x
   x = 2,287.52/69.91
6. Step 6: Final answer
   x = 32.72