Finding the Fourth Proportional to 11,357.69, 17,039.90 and 5,119.61

Step by Step Solution

1. Step 1: Write the proportion equation
   11,357.69 : 17,039.90 = 5,119.61 : x
2. Step 2: Convert to fraction form
   11,357.69/17,039.90 = 5,119.61/x
3. Step 3: Cross multiply
   11,357.69x = 17,039.90 × 5,119.61
4. Step 4: Simplify right side
   11,357.69x = 87,237,570.04
5. Step 5: Solve for x
   x = 87,237,570.04/11,357.69
6. Step 6: Final answer
   x = 7,680.93