Finding the Fourth Proportional to 72.50, 108.72 and 38.24

Step by Step Solution

1. Step 1: Write the proportion equation
   72.50 : 108.72 = 38.24 : x
2. Step 2: Convert to fraction form
   72.50/108.72 = 38.24/x
3. Step 3: Cross multiply
   72.50x = 108.72 × 38.24
4. Step 4: Simplify right side
   72.50x = 4,157.45
5. Step 5: Solve for x
   x = 4,157.45/72.50
6. Step 6: Final answer
   x = 57.34