Finding the Fourth Proportional to 72.10, 108.15 and 50.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72.10 : 108.15 = 50.38 : x
2. Step 2: Convert to fraction form
   72.10/108.15 = 50.38/x
3. Step 3: Cross multiply
   72.10x = 108.15 × 50.38
4. Step 4: Simplify right side
   72.10x = 5,448.18
5. Step 5: Solve for x
   x = 5,448.18/72.10
6. Step 6: Final answer
   x = 75.56