Finding the Fourth Proportional to 12,578.69, 17,359.02 and 6,913.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,578.69 : 17,359.02 = 6,913.96 : x
2. Step 2: Convert to fraction form
   12,578.69/17,359.02 = 6,913.96/x
3. Step 3: Cross multiply
   12,578.69x = 17,359.02 × 6,913.96
4. Step 4: Simplify right side
   12,578.69x = 120,019,526.52
5. Step 5: Solve for x
   x = 120,019,526.52/12,578.69
6. Step 6: Final answer
   x = 9,541.49