Finding the Fourth Proportional to 76.42, 105.48 and 48.82

Step by Step Solution

1. Step 1: Write the proportion equation
   76.42 : 105.48 = 48.82 : x
2. Step 2: Convert to fraction form
   76.42/105.48 = 48.82/x
3. Step 3: Cross multiply
   76.42x = 105.48 × 48.82
4. Step 4: Simplify right side
   76.42x = 5,149.53
5. Step 5: Solve for x
   x = 5,149.53/76.42
6. Step 6: Final answer
   x = 67.38