Finding the Fourth Proportional to 71.82, 108.18 and 65.16

Step by Step Solution

1. Step 1: Write the proportion equation
   71.82 : 108.18 = 65.16 : x
2. Step 2: Convert to fraction form
   71.82/108.18 = 65.16/x
3. Step 3: Cross multiply
   71.82x = 108.18 × 65.16
4. Step 4: Simplify right side
   71.82x = 7,049.01
5. Step 5: Solve for x
   x = 7,049.01/71.82
6. Step 6: Final answer
   x = 98.15