Finding the Fourth Proportional to 105.75, 158.69 and 48.75

Step by Step Solution

1. Step 1: Write the proportion equation
   105.75 : 158.69 = 48.75 : x
2. Step 2: Convert to fraction form
   105.75/158.69 = 48.75/x
3. Step 3: Cross multiply
   105.75x = 158.69 × 48.75
4. Step 4: Simplify right side
   105.75x = 7,735.89
5. Step 5: Solve for x
   x = 7,735.89/105.75
6. Step 6: Final answer
   x = 73.15