Finding the Fourth Proportional to 72.37, 108.74 and 65.71

Step by Step Solution

1. Step 1: Write the proportion equation
   72.37 : 108.74 = 65.71 : x
2. Step 2: Convert to fraction form
   72.37/108.74 = 65.71/x
3. Step 3: Cross multiply
   72.37x = 108.74 × 65.71
4. Step 4: Simplify right side
   72.37x = 7,145.31
5. Step 5: Solve for x
   x = 7,145.31/72.37
6. Step 6: Final answer
   x = 98.73