Finding the Fourth Proportional to 112.55, 168.89 and 100.67

Step by Step Solution

1. Step 1: Write the proportion equation
   112.55 : 168.89 = 100.67 : x
2. Step 2: Convert to fraction form
   112.55/168.89 = 100.67/x
3. Step 3: Cross multiply
   112.55x = 168.89 × 100.67
4. Step 4: Simplify right side
   112.55x = 17,000.81
5. Step 5: Solve for x
   x = 17,000.81/112.55
6. Step 6: Final answer
   x = 151.06