Finding the Fourth Proportional to 11,399.75, 17,099.47 and 3,608.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,399.75 : 17,099.47 = 3,608.56 : x
2. Step 2: Convert to fraction form
   11,399.75/17,099.47 = 3,608.56/x
3. Step 3: Cross multiply
   11,399.75x = 17,099.47 × 3,608.56
4. Step 4: Simplify right side
   11,399.75x = 61,704,411.69
5. Step 5: Solve for x
   x = 61,704,411.69/11,399.75
6. Step 6: Final answer
   x = 5,412.79