Finding the Fourth Proportional to 71.94, 108.42 and 64.73

Step by Step Solution

1. Step 1: Write the proportion equation
   71.94 : 108.42 = 64.73 : x
2. Step 2: Convert to fraction form
   71.94/108.42 = 64.73/x
3. Step 3: Cross multiply
   71.94x = 108.42 × 64.73
4. Step 4: Simplify right side
   71.94x = 7,017.69
5. Step 5: Solve for x
   x = 7,017.69/71.94
6. Step 6: Final answer
   x = 97.55