Finding the Fourth Proportional to 105.81, 158.52 and 82.92

Step by Step Solution

1. Step 1: Write the proportion equation
   105.81 : 158.52 = 82.92 : x
2. Step 2: Convert to fraction form
   105.81/158.52 = 82.92/x
3. Step 3: Cross multiply
   105.81x = 158.52 × 82.92
4. Step 4: Simplify right side
   105.81x = 13,144.48
5. Step 5: Solve for x
   x = 13,144.48/105.81
6. Step 6: Final answer
   x = 124.23