Finding the Fourth Proportional to 105.88, 158.72 and 75.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105.88 : 158.72 = 75.50 : x
2. Step 2: Convert to fraction form
   105.88/158.72 = 75.50/x
3. Step 3: Cross multiply
   105.88x = 158.72 × 75.50
4. Step 4: Simplify right side
   105.88x = 11,983.36
5. Step 5: Solve for x
   x = 11,983.36/105.88
6. Step 6: Final answer
   x = 113.18