Finding the Fourth Proportional to 111.98, 167.91 and 43.45

Step by Step Solution

1. Step 1: Write the proportion equation
   111.98 : 167.91 = 43.45 : x
2. Step 2: Convert to fraction form
   111.98/167.91 = 43.45/x
3. Step 3: Cross multiply
   111.98x = 167.91 × 43.45
4. Step 4: Simplify right side
   111.98x = 7,294.86
5. Step 5: Solve for x
   x = 7,294.86/111.98
6. Step 6: Final answer
   x = 65.14