Finding the Fourth Proportional to 112.18, 168.06 and 71.50

Step by Step Solution

1. Step 1: Write the proportion equation
   112.18 : 168.06 = 71.50 : x
2. Step 2: Convert to fraction form
   112.18/168.06 = 71.50/x
3. Step 3: Cross multiply
   112.18x = 168.06 × 71.50
4. Step 4: Simplify right side
   112.18x = 12,016.29
5. Step 5: Solve for x
   x = 12,016.29/112.18
6. Step 6: Final answer
   x = 107.12