Finding the Fourth Proportional to 111.09, 166.59 and 50.17

Step by Step Solution

1. Step 1: Write the proportion equation
   111.09 : 166.59 = 50.17 : x
2. Step 2: Convert to fraction form
   111.09/166.59 = 50.17/x
3. Step 3: Cross multiply
   111.09x = 166.59 × 50.17
4. Step 4: Simplify right side
   111.09x = 8,357.82
5. Step 5: Solve for x
   x = 8,357.82/111.09
6. Step 6: Final answer
   x = 75.23