Finding the Fourth Proportional to 105.42, 158.15 and 44.55

Step by Step Solution

1. Step 1: Write the proportion equation
   105.42 : 158.15 = 44.55 : x
2. Step 2: Convert to fraction form
   105.42/158.15 = 44.55/x
3. Step 3: Cross multiply
   105.42x = 158.15 × 44.55
4. Step 4: Simplify right side
   105.42x = 7,045.58
5. Step 5: Solve for x
   x = 7,045.58/105.42
6. Step 6: Final answer
   x = 66.83