Finding the Fourth Proportional to 105.83, 158.87 and 83.08

Step by Step Solution

1. Step 1: Write the proportion equation
   105.83 : 158.87 = 83.08 : x
2. Step 2: Convert to fraction form
   105.83/158.87 = 83.08/x
3. Step 3: Cross multiply
   105.83x = 158.87 × 83.08
4. Step 4: Simplify right side
   105.83x = 13,198.73
5. Step 5: Solve for x
   x = 13,198.73/105.83
6. Step 6: Final answer
   x = 124.72