Finding the Fourth Proportional to 11,865.05, 17,797.57 and 3,099.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,865.05 : 17,797.57 = 3,099.89 : x
2. Step 2: Convert to fraction form
   11,865.05/17,797.57 = 3,099.89/x
3. Step 3: Cross multiply
   11,865.05x = 17,797.57 × 3,099.89
4. Step 4: Simplify right side
   11,865.05x = 55,170,509.27
5. Step 5: Solve for x
   x = 55,170,509.27/11,865.05
6. Step 6: Final answer
   x = 4,649.83