Finding the Fourth Proportional to 72.59, 108.83 and 38.31

Step by Step Solution

1. Step 1: Write the proportion equation
   72.59 : 108.83 = 38.31 : x
2. Step 2: Convert to fraction form
   72.59/108.83 = 38.31/x
3. Step 3: Cross multiply
   72.59x = 108.83 × 38.31
4. Step 4: Simplify right side
   72.59x = 4,169.09
5. Step 5: Solve for x
   x = 4,169.09/72.59
6. Step 6: Final answer
   x = 57.44