Finding the Fourth Proportional to 11.71, 17.56 and 3.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11.71 : 17.56 = 3.69 : x
2. Step 2: Convert to fraction form
   11.71/17.56 = 3.69/x
3. Step 3: Cross multiply
   11.71x = 17.56 × 3.69
4. Step 4: Simplify right side
   11.71x = 64.78
5. Step 5: Solve for x
   x = 64.78/11.71
6. Step 6: Final answer
   x = 5.53