Finding the Fourth Proportional to 10.39, 15.59 and 3.97

Step by Step Solution

1. Step 1: Write the proportion equation
   10.39 : 15.59 = 3.97 : x
2. Step 2: Convert to fraction form
   10.39/15.59 = 3.97/x
3. Step 3: Cross multiply
   10.39x = 15.59 × 3.97
4. Step 4: Simplify right side
   10.39x = 61.89
5. Step 5: Solve for x
   x = 61.89/10.39
6. Step 6: Final answer
   x = 5.96