Finding the Fourth Proportional to 72.83, 109.26 and 18.73

Step by Step Solution

1. Step 1: Write the proportion equation
   72.83 : 109.26 = 18.73 : x
2. Step 2: Convert to fraction form
   72.83/109.26 = 18.73/x
3. Step 3: Cross multiply
   72.83x = 109.26 × 18.73
4. Step 4: Simplify right side
   72.83x = 2,046.10
5. Step 5: Solve for x
   x = 2,046.10/72.83
6. Step 6: Final answer
   x = 28.09