Finding the Fourth Proportional to 112.16, 168.33 and 100.82

Step by Step Solution

1. Step 1: Write the proportion equation
   112.16 : 168.33 = 100.82 : x
2. Step 2: Convert to fraction form
   112.16/168.33 = 100.82/x
3. Step 3: Cross multiply
   112.16x = 168.33 × 100.82
4. Step 4: Simplify right side
   112.16x = 16,971.03
5. Step 5: Solve for x
   x = 16,971.03/112.16
6. Step 6: Final answer
   x = 151.31