Finding the Fourth Proportional to 105.41, 158.27 and 82.86

Step by Step Solution

1. Step 1: Write the proportion equation
   105.41 : 158.27 = 82.86 : x
2. Step 2: Convert to fraction form
   105.41/158.27 = 82.86/x
3. Step 3: Cross multiply
   105.41x = 158.27 × 82.86
4. Step 4: Simplify right side
   105.41x = 13,114.25
5. Step 5: Solve for x
   x = 13,114.25/105.41
6. Step 6: Final answer
   x = 124.41