Finding the Fourth Proportional to 11,443.77, 17,161.68 and 5,439.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,443.77 : 17,161.68 = 5,439.12 : x
2. Step 2: Convert to fraction form
   11,443.77/17,161.68 = 5,439.12/x
3. Step 3: Cross multiply
   11,443.77x = 17,161.68 × 5,439.12
4. Step 4: Simplify right side
   11,443.77x = 93,344,436.92
5. Step 5: Solve for x
   x = 93,344,436.92/11,443.77
6. Step 6: Final answer
   x = 8,156.79