Finding the Fourth Proportional to 111.98, 168.03 and 43.56

Step by Step Solution

1. Step 1: Write the proportion equation
   111.98 : 168.03 = 43.56 : x
2. Step 2: Convert to fraction form
   111.98/168.03 = 43.56/x
3. Step 3: Cross multiply
   111.98x = 168.03 × 43.56
4. Step 4: Simplify right side
   111.98x = 7,319.39
5. Step 5: Solve for x
   x = 7,319.39/111.98
6. Step 6: Final answer
   x = 65.37