Finding the Fourth Proportional to 72.88, 109.17 and 48.49

Step by Step Solution

1. Step 1: Write the proportion equation
   72.88 : 109.17 = 48.49 : x
2. Step 2: Convert to fraction form
   72.88/109.17 = 48.49/x
3. Step 3: Cross multiply
   72.88x = 109.17 × 48.49
4. Step 4: Simplify right side
   72.88x = 5,293.38
5. Step 5: Solve for x
   x = 5,293.38/72.88
6. Step 6: Final answer
   x = 72.63