Finding the Fourth Proportional to 111.60, 167.72 and 99.48

Step by Step Solution

1. Step 1: Write the proportion equation
   111.60 : 167.72 = 99.48 : x
2. Step 2: Convert to fraction form
   111.60/167.72 = 99.48/x
3. Step 3: Cross multiply
   111.60x = 167.72 × 99.48
4. Step 4: Simplify right side
   111.60x = 16,684.79
5. Step 5: Solve for x
   x = 16,684.79/111.60
6. Step 6: Final answer
   x = 149.51