Finding the Fourth Proportional to 105.89, 158.83 and 88.61

Step by Step Solution

1. Step 1: Write the proportion equation
   105.89 : 158.83 = 88.61 : x
2. Step 2: Convert to fraction form
   105.89/158.83 = 88.61/x
3. Step 3: Cross multiply
   105.89x = 158.83 × 88.61
4. Step 4: Simplify right side
   105.89x = 14,072.91
5. Step 5: Solve for x
   x = 14,072.91/105.89
6. Step 6: Final answer
   x = 132.91