Finding the Fourth Proportional to 42.23, 63.31 and 19.37

Step by Step Solution

1. Step 1: Write the proportion equation
   42.23 : 63.31 = 19.37 : x
2. Step 2: Convert to fraction form
   42.23/63.31 = 19.37/x
3. Step 3: Cross multiply
   42.23x = 63.31 × 19.37
4. Step 4: Simplify right side
   42.23x = 1,226.31
5. Step 5: Solve for x
   x = 1,226.31/42.23
6. Step 6: Final answer
   x = 29.04