Finding the Fourth Proportional to 78.88, 118.24 and 48.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78.88 : 118.24 = 48.56 : x
2. Step 2: Convert to fraction form
   78.88/118.24 = 48.56/x
3. Step 3: Cross multiply
   78.88x = 118.24 × 48.56
4. Step 4: Simplify right side
   78.88x = 5,741.73
5. Step 5: Solve for x
   x = 5,741.73/78.88
6. Step 6: Final answer
   x = 72.79