Finding the Fourth Proportional to 111.08, 166.14 and 100.86

Step by Step Solution

1. Step 1: Write the proportion equation
   111.08 : 166.14 = 100.86 : x
2. Step 2: Convert to fraction form
   111.08/166.14 = 100.86/x
3. Step 3: Cross multiply
   111.08x = 166.14 × 100.86
4. Step 4: Simplify right side
   111.08x = 16,756.88
5. Step 5: Solve for x
   x = 16,756.88/111.08
6. Step 6: Final answer
   x = 150.86