Finding the Fourth Proportional to 112.15, 167.54 and 100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112.15 : 167.54 = 100.72 : x
2. Step 2: Convert to fraction form
   112.15/167.54 = 100.72/x
3. Step 3: Cross multiply
   112.15x = 167.54 × 100.72
4. Step 4: Simplify right side
   112.15x = 16,874.63
5. Step 5: Solve for x
   x = 16,874.63/112.15
6. Step 6: Final answer
   x = 150.46