Finding the Fourth Proportional to 72.57, 108.93 and 67.71

Step by Step Solution

1. Step 1: Write the proportion equation
   72.57 : 108.93 = 67.71 : x
2. Step 2: Convert to fraction form
   72.57/108.93 = 67.71/x
3. Step 3: Cross multiply
   72.57x = 108.93 × 67.71
4. Step 4: Simplify right side
   72.57x = 7,375.65
5. Step 5: Solve for x
   x = 7,375.65/72.57
6. Step 6: Final answer
   x = 101.63