Finding the Fourth Proportional to 111.59, 167.39 and 50.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111.59 : 167.39 = 50.72 : x
2. Step 2: Convert to fraction form
   111.59/167.39 = 50.72/x
3. Step 3: Cross multiply
   111.59x = 167.39 × 50.72
4. Step 4: Simplify right side
   111.59x = 8,489.77
5. Step 5: Solve for x
   x = 8,489.77/111.59
6. Step 6: Final answer
   x = 76.08