Finding the Fourth Proportional to 111.15, 166.69 and 34.12

Step by Step Solution

1. Step 1: Write the proportion equation
   111.15 : 166.69 = 34.12 : x
2. Step 2: Convert to fraction form
   111.15/166.69 = 34.12/x
3. Step 3: Cross multiply
   111.15x = 166.69 × 34.12
4. Step 4: Simplify right side
   111.15x = 5,687.46
5. Step 5: Solve for x
   x = 5,687.46/111.15
6. Step 6: Final answer
   x = 51.17