Finding the Fourth Proportional to 42.69, 63.91 and 38.23

Step by Step Solution

1. Step 1: Write the proportion equation
   42.69 : 63.91 = 38.23 : x
2. Step 2: Convert to fraction form
   42.69/63.91 = 38.23/x
3. Step 3: Cross multiply
   42.69x = 63.91 × 38.23
4. Step 4: Simplify right side
   42.69x = 2,443.28
5. Step 5: Solve for x
   x = 2,443.28/42.69
6. Step 6: Final answer
   x = 57.23