Finding the Fourth Proportional to 111.93, 167.80 and 43.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.93 : 167.80 = 43.42 : x
2. Step 2: Convert to fraction form
   111.93/167.80 = 43.42/x
3. Step 3: Cross multiply
   111.93x = 167.80 × 43.42
4. Step 4: Simplify right side
   111.93x = 7,285.88
5. Step 5: Solve for x
   x = 7,285.88/111.93
6. Step 6: Final answer
   x = 65.09