Finding the Fourth Proportional to 111.88, 167.86 and 43.45

Step by Step Solution

1. Step 1: Write the proportion equation
   111.88 : 167.86 = 43.45 : x
2. Step 2: Convert to fraction form
   111.88/167.86 = 43.45/x
3. Step 3: Cross multiply
   111.88x = 167.86 × 43.45
4. Step 4: Simplify right side
   111.88x = 7,293.52
5. Step 5: Solve for x
   x = 7,293.52/111.88
6. Step 6: Final answer
   x = 65.19