Finding the Fourth Proportional to 51.69, 71.33 and 28.69

Step by Step Solution

1. Step 1: Write the proportion equation
   51.69 : 71.33 = 28.69 : x
2. Step 2: Convert to fraction form
   51.69/71.33 = 28.69/x
3. Step 3: Cross multiply
   51.69x = 71.33 × 28.69
4. Step 4: Simplify right side
   51.69x = 2,046.46
5. Step 5: Solve for x
   x = 2,046.46/51.69
6. Step 6: Final answer
   x = 39.59