Finding the Fourth Proportional to 111.76, 167.59 and 50.78

Step by Step Solution

1. Step 1: Write the proportion equation
   111.76 : 167.59 = 50.78 : x
2. Step 2: Convert to fraction form
   111.76/167.59 = 50.78/x
3. Step 3: Cross multiply
   111.76x = 167.59 × 50.78
4. Step 4: Simplify right side
   111.76x = 8,510.22
5. Step 5: Solve for x
   x = 8,510.22/111.76
6. Step 6: Final answer
   x = 76.15