Finding the Fourth Proportional to 72.99, 109.52 and 38.71

Step by Step Solution

1. Step 1: Write the proportion equation
   72.99 : 109.52 = 38.71 : x
2. Step 2: Convert to fraction form
   72.99/109.52 = 38.71/x
3. Step 3: Cross multiply
   72.99x = 109.52 × 38.71
4. Step 4: Simplify right side
   72.99x = 4,239.46
5. Step 5: Solve for x
   x = 4,239.46/72.99
6. Step 6: Final answer
   x = 58.08