Finding the Fourth Proportional to 72.24, 108.18 and 50.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72.24 : 108.18 = 50.52 : x
2. Step 2: Convert to fraction form
   72.24/108.18 = 50.52/x
3. Step 3: Cross multiply
   72.24x = 108.18 × 50.52
4. Step 4: Simplify right side
   72.24x = 5,465.25
5. Step 5: Solve for x
   x = 5,465.25/72.24
6. Step 6: Final answer
   x = 75.65