Finding the Fourth Proportional to 11.50, 15.56 and 11.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11.50 : 15.56 = 11.50 : x
2. Step 2: Convert to fraction form
   11.50/15.56 = 11.50/x
3. Step 3: Cross multiply
   11.50x = 15.56 × 11.50
4. Step 4: Simplify right side
   11.50x = 178.94
5. Step 5: Solve for x
   x = 178.94/11.50
6. Step 6: Final answer
   x = 15.56