Finding the Fourth Proportional to 105.82, 158.42 and 99.95

Step by Step Solution

1. Step 1: Write the proportion equation
   105.82 : 158.42 = 99.95 : x
2. Step 2: Convert to fraction form
   105.82/158.42 = 99.95/x
3. Step 3: Cross multiply
   105.82x = 158.42 × 99.95
4. Step 4: Simplify right side
   105.82x = 15,833.54
5. Step 5: Solve for x
   x = 15,833.54/105.82
6. Step 6: Final answer
   x = 149.63