Finding the Fourth Proportional to 72.69, 109.04 and 18.59

Step by Step Solution

1. Step 1: Write the proportion equation
   72.69 : 109.04 = 18.59 : x
2. Step 2: Convert to fraction form
   72.69/109.04 = 18.59/x
3. Step 3: Cross multiply
   72.69x = 109.04 × 18.59
4. Step 4: Simplify right side
   72.69x = 2,026.42
5. Step 5: Solve for x
   x = 2,026.42/72.69
6. Step 6: Final answer
   x = 27.88