Finding the Fourth Proportional to 105.96, 146.17 and 91.38

Step by Step Solution

1. Step 1: Write the proportion equation
   105.96 : 146.17 = 91.38 : x
2. Step 2: Convert to fraction form
   105.96/146.17 = 91.38/x
3. Step 3: Cross multiply
   105.96x = 146.17 × 91.38
4. Step 4: Simplify right side
   105.96x = 13,357.01
5. Step 5: Solve for x
   x = 13,357.01/105.96
6. Step 6: Final answer
   x = 126.06