Finding the Fourth Proportional to 112.52, 168.72 and 72.23

Step by Step Solution

1. Step 1: Write the proportion equation
   112.52 : 168.72 = 72.23 : x
2. Step 2: Convert to fraction form
   112.52/168.72 = 72.23/x
3. Step 3: Cross multiply
   112.52x = 168.72 × 72.23
4. Step 4: Simplify right side
   112.52x = 12,186.65
5. Step 5: Solve for x
   x = 12,186.65/112.52
6. Step 6: Final answer
   x = 108.31