Finding the Fourth Proportional to 19.69, 29.31 and 19

Step by Step Solution

1. Step 1: Write the proportion equation
   19.69 : 29.31 = 19 : x
2. Step 2: Convert to fraction form
   19.69/29.31 = 19/x
3. Step 3: Cross multiply
   19.69x = 29.31 × 19
4. Step 4: Simplify right side
   19.69x = 556.89
5. Step 5: Solve for x
   x = 556.89/19.69
6. Step 6: Final answer
   x = 28.28