Finding the Fourth Proportional to 12,259.49, 18,392.40 and 3,940.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,259.49 : 18,392.40 = 3,940.67 : x
2. Step 2: Convert to fraction form
   12,259.49/18,392.40 = 3,940.67/x
3. Step 3: Cross multiply
   12,259.49x = 18,392.40 × 3,940.67
4. Step 4: Simplify right side
   12,259.49x = 72,478,424.89
5. Step 5: Solve for x
   x = 72,478,424.89/12,259.49
6. Step 6: Final answer
   x = 5,912.03