Finding the Fourth Proportional to 105.33, 158.22 and 99.17

Step by Step Solution

1. Step 1: Write the proportion equation
   105.33 : 158.22 = 99.17 : x
2. Step 2: Convert to fraction form
   105.33/158.22 = 99.17/x
3. Step 3: Cross multiply
   105.33x = 158.22 × 99.17
4. Step 4: Simplify right side
   105.33x = 15,689.89
5. Step 5: Solve for x
   x = 15,689.89/105.33
6. Step 6: Final answer
   x = 148.96