Finding the Fourth Proportional to 11.78, 17.69 and 11.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11.78 : 17.69 = 11.34 : x
2. Step 2: Convert to fraction form
   11.78/17.69 = 11.34/x
3. Step 3: Cross multiply
   11.78x = 17.69 × 11.34
4. Step 4: Simplify right side
   11.78x = 200.55
5. Step 5: Solve for x
   x = 200.55/11.78
6. Step 6: Final answer
   x = 17.03