Finding the Fourth Proportional to 72.35, 109.17 and 69.54

Step by Step Solution

1. Step 1: Write the proportion equation
   72.35 : 109.17 = 69.54 : x
2. Step 2: Convert to fraction form
   72.35/109.17 = 69.54/x
3. Step 3: Cross multiply
   72.35x = 109.17 × 69.54
4. Step 4: Simplify right side
   72.35x = 7,591.94
5. Step 5: Solve for x
   x = 7,591.94/72.35
6. Step 6: Final answer
   x = 104.93