Finding the Fourth Proportional to 11.00, 15.18 and 10.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11.00 : 15.18 = 10.09 : x
2. Step 2: Convert to fraction form
   11.00/15.18 = 10.09/x
3. Step 3: Cross multiply
   11.00x = 15.18 × 10.09
4. Step 4: Simplify right side
   11.00x = 153.15
5. Step 5: Solve for x
   x = 153.15/11.00
6. Step 6: Final answer
   x = 13.92