Finding the Fourth Proportional to 72.65, 108.18 and 72.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72.65 : 108.18 = 72.35 : x
2. Step 2: Convert to fraction form
   72.65/108.18 = 72.35/x
3. Step 3: Cross multiply
   72.65x = 108.18 × 72.35
4. Step 4: Simplify right side
   72.65x = 7,826.82
5. Step 5: Solve for x
   x = 7,826.82/72.65
6. Step 6: Final answer
   x = 107.73