Finding the Fourth Proportional to 111.60, 167.39 and 30.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.60 : 167.39 = 30.42 : x
2. Step 2: Convert to fraction form
   111.60/167.39 = 30.42/x
3. Step 3: Cross multiply
   111.60x = 167.39 × 30.42
4. Step 4: Simplify right side
   111.60x = 5,092.31
5. Step 5: Solve for x
   x = 5,092.31/111.60
6. Step 6: Final answer
   x = 45.63