Finding the Fourth Proportional to 12,262.92, 18,388.57 and 3,940.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,262.92 : 18,388.57 = 3,940.70 : x
2. Step 2: Convert to fraction form
   12,262.92/18,388.57 = 3,940.70/x
3. Step 3: Cross multiply
   12,262.92x = 18,388.57 × 3,940.70
4. Step 4: Simplify right side
   12,262.92x = 72,463,846.83
5. Step 5: Solve for x
   x = 72,463,846.83/12,262.92
6. Step 6: Final answer
   x = 5,909.18