Finding the Fourth Proportional to 112.82, 168.89 and 105.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112.82 : 168.89 = 105.60 : x
2. Step 2: Convert to fraction form
   112.82/168.89 = 105.60/x
3. Step 3: Cross multiply
   112.82x = 168.89 × 105.60
4. Step 4: Simplify right side
   112.82x = 17,834.26
5. Step 5: Solve for x
   x = 17,834.26/112.82
6. Step 6: Final answer
   x = 158.08