Finding the Fourth Proportional to 73.18, 109.37 and 64.72

Step by Step Solution

1. Step 1: Write the proportion equation
   73.18 : 109.37 = 64.72 : x
2. Step 2: Convert to fraction form
   73.18/109.37 = 64.72/x
3. Step 3: Cross multiply
   73.18x = 109.37 × 64.72
4. Step 4: Simplify right side
   73.18x = 7,078.43
5. Step 5: Solve for x
   x = 7,078.43/73.18
6. Step 6: Final answer
   x = 96.73