Finding the Fourth Proportional to 12,280.67, 18,424.59 and 3,960.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,280.67 : 18,424.59 = 3,960.51 : x
2. Step 2: Convert to fraction form
   12,280.67/18,424.59 = 3,960.51/x
3. Step 3: Cross multiply
   12,280.67x = 18,424.59 × 3,960.51
4. Step 4: Simplify right side
   12,280.67x = 72,970,772.94
5. Step 5: Solve for x
   x = 72,970,772.94/12,280.67
6. Step 6: Final answer
   x = 5,941.92