Finding the Fourth Proportional to 112.37, 168.59 and 71.49

Step by Step Solution

1. Step 1: Write the proportion equation
   112.37 : 168.59 = 71.49 : x
2. Step 2: Convert to fraction form
   112.37/168.59 = 71.49/x
3. Step 3: Cross multiply
   112.37x = 168.59 × 71.49
4. Step 4: Simplify right side
   112.37x = 12,053.22
5. Step 5: Solve for x
   x = 12,053.22/112.37
6. Step 6: Final answer
   x = 107.26