Finding the Fourth Proportional to 11,424.39, 17,141.85 and 7,039.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,424.39 : 17,141.85 = 7,039.05 : x
2. Step 2: Convert to fraction form
   11,424.39/17,141.85 = 7,039.05/x
3. Step 3: Cross multiply
   11,424.39x = 17,141.85 × 7,039.05
4. Step 4: Simplify right side
   11,424.39x = 120,662,339.24
5. Step 5: Solve for x
   x = 120,662,339.24/11,424.39
6. Step 6: Final answer
   x = 10,561.82