Finding the Fourth Proportional to 12,960.15, 19,440.27 and 3,600.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,960.15 : 19,440.27 = 3,600.69 : x
2. Step 2: Convert to fraction form
   12,960.15/19,440.27 = 3,600.69/x
3. Step 3: Cross multiply
   12,960.15x = 19,440.27 × 3,600.69
4. Step 4: Simplify right side
   12,960.15x = 69,998,385.79
5. Step 5: Solve for x
   x = 69,998,385.79/12,960.15
6. Step 6: Final answer
   x = 5,401.05