Finding the Fourth Proportional to 105.98, 158.81 and 89.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105.98 : 158.81 = 89.82 : x
2. Step 2: Convert to fraction form
   105.98/158.81 = 89.82/x
3. Step 3: Cross multiply
   105.98x = 158.81 × 89.82
4. Step 4: Simplify right side
   105.98x = 14,263.87
5. Step 5: Solve for x
   x = 14,263.87/105.98
6. Step 6: Final answer
   x = 134.60