Finding the Fourth Proportional to 111.65, 167.37 and 100.81

Step by Step Solution

1. Step 1: Write the proportion equation
   111.65 : 167.37 = 100.81 : x
2. Step 2: Convert to fraction form
   111.65/167.37 = 100.81/x
3. Step 3: Cross multiply
   111.65x = 167.37 × 100.81
4. Step 4: Simplify right side
   111.65x = 16,872.40
5. Step 5: Solve for x
   x = 16,872.40/111.65
6. Step 6: Final answer
   x = 151.13