Finding the Fourth Proportional to 19.37, 28.82 and 19.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19.37 : 28.82 = 19.31 : x
2. Step 2: Convert to fraction form
   19.37/28.82 = 19.31/x
3. Step 3: Cross multiply
   19.37x = 28.82 × 19.31
4. Step 4: Simplify right side
   19.37x = 556.51
5. Step 5: Solve for x
   x = 556.51/19.37
6. Step 6: Final answer
   x = 28.73