Finding the Fourth Proportional to 111.48, 167.88 and 98.76

Step by Step Solution

1. Step 1: Write the proportion equation
   111.48 : 167.88 = 98.76 : x
2. Step 2: Convert to fraction form
   111.48/167.88 = 98.76/x
3. Step 3: Cross multiply
   111.48x = 167.88 × 98.76
4. Step 4: Simplify right side
   111.48x = 16,579.83
5. Step 5: Solve for x
   x = 16,579.83/111.48
6. Step 6: Final answer
   x = 148.72