Finding the Fourth Proportional to 111.78, 167.69 and 50.88

Step by Step Solution

1. Step 1: Write the proportion equation
   111.78 : 167.69 = 50.88 : x
2. Step 2: Convert to fraction form
   111.78/167.69 = 50.88/x
3. Step 3: Cross multiply
   111.78x = 167.69 × 50.88
4. Step 4: Simplify right side
   111.78x = 8,531.81
5. Step 5: Solve for x
   x = 8,531.81/111.78
6. Step 6: Final answer
   x = 76.33