Finding the Fourth Proportional to 74.52, 111.27 and 72.09

Step by Step Solution

1. Step 1: Write the proportion equation
   74.52 : 111.27 = 72.09 : x
2. Step 2: Convert to fraction form
   74.52/111.27 = 72.09/x
3. Step 3: Cross multiply
   74.52x = 111.27 × 72.09
4. Step 4: Simplify right side
   74.52x = 8,021.72
5. Step 5: Solve for x
   x = 8,021.72/74.52
6. Step 6: Final answer
   x = 107.65