Finding the Fourth Proportional to 12,738.35, 17,587.68 and 7,960.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,738.35 : 17,587.68 = 7,960.37 : x
2. Step 2: Convert to fraction form
   12,738.35/17,587.68 = 7,960.37/x
3. Step 3: Cross multiply
   12,738.35x = 17,587.68 × 7,960.37
4. Step 4: Simplify right side
   12,738.35x = 140,004,352.30
5. Step 5: Solve for x
   x = 140,004,352.30/12,738.35
6. Step 6: Final answer
   x = 10,990.78