Finding the Fourth Proportional to 72.36, 108.72 and 72.08

Step by Step Solution

1. Step 1: Write the proportion equation
   72.36 : 108.72 = 72.08 : x
2. Step 2: Convert to fraction form
   72.36/108.72 = 72.08/x
3. Step 3: Cross multiply
   72.36x = 108.72 × 72.08
4. Step 4: Simplify right side
   72.36x = 7,836.54
5. Step 5: Solve for x
   x = 7,836.54/72.36
6. Step 6: Final answer
   x = 108.30