Finding the Fourth Proportional to 11,317.59, 16,974.50 and 3,920.29

Step by Step Solution

1. Step 1: Write the proportion equation
   11,317.59 : 16,974.50 = 3,920.29 : x
2. Step 2: Convert to fraction form
   11,317.59/16,974.50 = 3,920.29/x
3. Step 3: Cross multiply
   11,317.59x = 16,974.50 × 3,920.29
4. Step 4: Simplify right side
   11,317.59x = 66,544,900.57
5. Step 5: Solve for x
   x = 66,544,900.57/11,317.59
6. Step 6: Final answer
   x = 5,879.78