Finding the Fourth Proportional to 111.97, 167.55 and 100.36

Step by Step Solution

1. Step 1: Write the proportion equation
   111.97 : 167.55 = 100.36 : x
2. Step 2: Convert to fraction form
   111.97/167.55 = 100.36/x
3. Step 3: Cross multiply
   111.97x = 167.55 × 100.36
4. Step 4: Simplify right side
   111.97x = 16,815.32
5. Step 5: Solve for x
   x = 16,815.32/111.97
6. Step 6: Final answer
   x = 150.18