Finding the Fourth Proportional to 72.58, 108.97 and 71.82

Step by Step Solution

1. Step 1: Write the proportion equation
   72.58 : 108.97 = 71.82 : x
2. Step 2: Convert to fraction form
   72.58/108.97 = 71.82/x
3. Step 3: Cross multiply
   72.58x = 108.97 × 71.82
4. Step 4: Simplify right side
   72.58x = 7,825.98
5. Step 5: Solve for x
   x = 7,825.98/72.58
6. Step 6: Final answer
   x = 107.82