Finding the Fourth Proportional to 69.36, 103.98 and 28.72

Step by Step Solution

1. Step 1: Write the proportion equation
   69.36 : 103.98 = 28.72 : x
2. Step 2: Convert to fraction form
   69.36/103.98 = 28.72/x
3. Step 3: Cross multiply
   69.36x = 103.98 × 28.72
4. Step 4: Simplify right side
   69.36x = 2,986.54
5. Step 5: Solve for x
   x = 2,986.54/69.36
6. Step 6: Final answer
   x = 43.06