Finding the Fourth Proportional to 111.61, 167.31 and 50.71

Step by Step Solution

1. Step 1: Write the proportion equation
   111.61 : 167.31 = 50.71 : x
2. Step 2: Convert to fraction form
   111.61/167.31 = 50.71/x
3. Step 3: Cross multiply
   111.61x = 167.31 × 50.71
4. Step 4: Simplify right side
   111.61x = 8,484.29
5. Step 5: Solve for x
   x = 8,484.29/111.61
6. Step 6: Final answer
   x = 76.02