Finding the Fourth Proportional to 11,411.91, 17,120.39 and 3,515.13

Step by Step Solution

1. Step 1: Write the proportion equation
   11,411.91 : 17,120.39 = 3,515.13 : x
2. Step 2: Convert to fraction form
   11,411.91/17,120.39 = 3,515.13/x
3. Step 3: Cross multiply
   11,411.91x = 17,120.39 × 3,515.13
4. Step 4: Simplify right side
   11,411.91x = 60,180,378.93
5. Step 5: Solve for x
   x = 60,180,378.93/11,411.91
6. Step 6: Final answer
   x = 5,273.47