Finding the Fourth Proportional to 111.93, 167.88 and 30.78

Step by Step Solution

1. Step 1: Write the proportion equation
   111.93 : 167.88 = 30.78 : x
2. Step 2: Convert to fraction form
   111.93/167.88 = 30.78/x
3. Step 3: Cross multiply
   111.93x = 167.88 × 30.78
4. Step 4: Simplify right side
   111.93x = 5,167.35
5. Step 5: Solve for x
   x = 5,167.35/111.93
6. Step 6: Final answer
   x = 46.17