Finding the Fourth Proportional to 105.29, 158.29 and 82.73

Step by Step Solution

1. Step 1: Write the proportion equation
   105.29 : 158.29 = 82.73 : x
2. Step 2: Convert to fraction form
   105.29/158.29 = 82.73/x
3. Step 3: Cross multiply
   105.29x = 158.29 × 82.73
4. Step 4: Simplify right side
   105.29x = 13,096.09
5. Step 5: Solve for x
   x = 13,096.09/105.29
6. Step 6: Final answer
   x = 124.38