Finding the Fourth Proportional to 112.69, 168.22 and 99.02

Step by Step Solution

1. Step 1: Write the proportion equation
   112.69 : 168.22 = 99.02 : x
2. Step 2: Convert to fraction form
   112.69/168.22 = 99.02/x
3. Step 3: Cross multiply
   112.69x = 168.22 × 99.02
4. Step 4: Simplify right side
   112.69x = 16,658.03
5. Step 5: Solve for x
   x = 16,658.03/112.69
6. Step 6: Final answer
   x = 147.82