Finding the Fourth Proportional to 111.43, 166.86 and 101.17

Step by Step Solution

1. Step 1: Write the proportion equation
   111.43 : 166.86 = 101.17 : x
2. Step 2: Convert to fraction form
   111.43/166.86 = 101.17/x
3. Step 3: Cross multiply
   111.43x = 166.86 × 101.17
4. Step 4: Simplify right side
   111.43x = 16,879.89
5. Step 5: Solve for x
   x = 16,879.89/111.43
6. Step 6: Final answer
   x = 151.49