Finding the Fourth Proportional to 111.87, 167.78 and 30.69

Step by Step Solution

1. Step 1: Write the proportion equation
   111.87 : 167.78 = 30.69 : x
2. Step 2: Convert to fraction form
   111.87/167.78 = 30.69/x
3. Step 3: Cross multiply
   111.87x = 167.78 × 30.69
4. Step 4: Simplify right side
   111.87x = 5,149.52
5. Step 5: Solve for x
   x = 5,149.52/111.87
6. Step 6: Final answer
   x = 46.03