Finding the Fourth Proportional to 111.78, 167.64 and 34.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111.78 : 167.64 = 34.72 : x
2. Step 2: Convert to fraction form
   111.78/167.64 = 34.72/x
3. Step 3: Cross multiply
   111.78x = 167.64 × 34.72
4. Step 4: Simplify right side
   111.78x = 5,820.46
5. Step 5: Solve for x
   x = 5,820.46/111.78
6. Step 6: Final answer
   x = 52.07