Finding the Fourth Proportional to 72.42, 108.72 and 36.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72.42 : 108.72 = 36.38 : x
2. Step 2: Convert to fraction form
   72.42/108.72 = 36.38/x
3. Step 3: Cross multiply
   72.42x = 108.72 × 36.38
4. Step 4: Simplify right side
   72.42x = 3,955.23
5. Step 5: Solve for x
   x = 3,955.23/72.42
6. Step 6: Final answer
   x = 54.62