Finding the Fourth Proportional to 105.59, 158.12 and 88.43

Step by Step Solution

1. Step 1: Write the proportion equation
   105.59 : 158.12 = 88.43 : x
2. Step 2: Convert to fraction form
   105.59/158.12 = 88.43/x
3. Step 3: Cross multiply
   105.59x = 158.12 × 88.43
4. Step 4: Simplify right side
   105.59x = 13,983.17
5. Step 5: Solve for x
   x = 13,983.17/105.59
6. Step 6: Final answer
   x = 132.43