Finding the Fourth Proportional to 69.29, 103.86 and 28.72

Step by Step Solution

1. Step 1: Write the proportion equation
   69.29 : 103.86 = 28.72 : x
2. Step 2: Convert to fraction form
   69.29/103.86 = 28.72/x
3. Step 3: Cross multiply
   69.29x = 103.86 × 28.72
4. Step 4: Simplify right side
   69.29x = 2,982.86
5. Step 5: Solve for x
   x = 2,982.86/69.29
6. Step 6: Final answer
   x = 43.05