Finding the Fourth Proportional to 111.47, 168.12 and 107.82

Step by Step Solution

1. Step 1: Write the proportion equation
   111.47 : 168.12 = 107.82 : x
2. Step 2: Convert to fraction form
   111.47/168.12 = 107.82/x
3. Step 3: Cross multiply
   111.47x = 168.12 × 107.82
4. Step 4: Simplify right side
   111.47x = 18,126.70
5. Step 5: Solve for x
   x = 18,126.70/111.47
6. Step 6: Final answer
   x = 162.62