Finding the Fourth Proportional to 72.78, 109.18 and 24.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72.78 : 109.18 = 24.72 : x
2. Step 2: Convert to fraction form
   72.78/109.18 = 24.72/x
3. Step 3: Cross multiply
   72.78x = 109.18 × 24.72
4. Step 4: Simplify right side
   72.78x = 2,698.93
5. Step 5: Solve for x
   x = 2,698.93/72.78
6. Step 6: Final answer
   x = 37.08