Finding the Fourth Proportional to 11,411.15, 17,117.21 and 3,919.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,411.15 : 17,117.21 = 3,919.86 : x
2. Step 2: Convert to fraction form
   11,411.15/17,117.21 = 3,919.86/x
3. Step 3: Cross multiply
   11,411.15x = 17,117.21 × 3,919.86
4. Step 4: Simplify right side
   11,411.15x = 67,097,054.54
5. Step 5: Solve for x
   x = 67,097,054.54/11,411.15
6. Step 6: Final answer
   x = 5,879.96