Finding the Fourth Proportional to 72.05, 108.09 and 52.83

Step by Step Solution

1. Step 1: Write the proportion equation
   72.05 : 108.09 = 52.83 : x
2. Step 2: Convert to fraction form
   72.05/108.09 = 52.83/x
3. Step 3: Cross multiply
   72.05x = 108.09 × 52.83
4. Step 4: Simplify right side
   72.05x = 5,710.39
5. Step 5: Solve for x
   x = 5,710.39/72.05
6. Step 6: Final answer
   x = 79.26