Finding the Fourth Proportional to 52.71, 72.72 and 38.15

Step by Step Solution

1. Step 1: Write the proportion equation
   52.71 : 72.72 = 38.15 : x
2. Step 2: Convert to fraction form
   52.71/72.72 = 38.15/x
3. Step 3: Cross multiply
   52.71x = 72.72 × 38.15
4. Step 4: Simplify right side
   52.71x = 2,774.27
5. Step 5: Solve for x
   x = 2,774.27/52.71
6. Step 6: Final answer
   x = 52.63