Finding the Fourth Proportional to 111.96, 167.99 and 75.81

Step by Step Solution

1. Step 1: Write the proportion equation
   111.96 : 167.99 = 75.81 : x
2. Step 2: Convert to fraction form
   111.96/167.99 = 75.81/x
3. Step 3: Cross multiply
   111.96x = 167.99 × 75.81
4. Step 4: Simplify right side
   111.96x = 12,735.32
5. Step 5: Solve for x
   x = 12,735.32/111.96
6. Step 6: Final answer
   x = 113.75