Finding the Fourth Proportional to 111.39, 167.18 and 99.96

Step by Step Solution

1. Step 1: Write the proportion equation
   111.39 : 167.18 = 99.96 : x
2. Step 2: Convert to fraction form
   111.39/167.18 = 99.96/x
3. Step 3: Cross multiply
   111.39x = 167.18 × 99.96
4. Step 4: Simplify right side
   111.39x = 16,710.81
5. Step 5: Solve for x
   x = 16,710.81/111.39
6. Step 6: Final answer
   x = 150.02