Finding the Fourth Proportional to 112.43, 168.71 and 76.38

Step by Step Solution

1. Step 1: Write the proportion equation
   112.43 : 168.71 = 76.38 : x
2. Step 2: Convert to fraction form
   112.43/168.71 = 76.38/x
3. Step 3: Cross multiply
   112.43x = 168.71 × 76.38
4. Step 4: Simplify right side
   112.43x = 12,885.69
5. Step 5: Solve for x
   x = 12,885.69/112.43
6. Step 6: Final answer
   x = 114.62