Finding the Fourth Proportional to 111.81, 167.29 and 100.58

Step by Step Solution

1. Step 1: Write the proportion equation
   111.81 : 167.29 = 100.58 : x
2. Step 2: Convert to fraction form
   111.81/167.29 = 100.58/x
3. Step 3: Cross multiply
   111.81x = 167.29 × 100.58
4. Step 4: Simplify right side
   111.81x = 16,826.03
5. Step 5: Solve for x
   x = 16,826.03/111.81
6. Step 6: Final answer
   x = 150.49