Finding the Fourth Proportional to 72.52, 108.18 and 71.62

Step by Step Solution

1. Step 1: Write the proportion equation
   72.52 : 108.18 = 71.62 : x
2. Step 2: Convert to fraction form
   72.52/108.18 = 71.62/x
3. Step 3: Cross multiply
   72.52x = 108.18 × 71.62
4. Step 4: Simplify right side
   72.52x = 7,747.58
5. Step 5: Solve for x
   x = 7,747.58/72.52
6. Step 6: Final answer
   x = 106.84