Finding the Fourth Proportional to 12,260.88, 18,389.16 and 3,940.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,260.88 : 18,389.16 = 3,940.56 : x
2. Step 2: Convert to fraction form
   12,260.88/18,389.16 = 3,940.56/x
3. Step 3: Cross multiply
   12,260.88x = 18,389.16 × 3,940.56
4. Step 4: Simplify right side
   12,260.88x = 72,463,588.33
5. Step 5: Solve for x
   x = 72,463,588.33/12,260.88
6. Step 6: Final answer
   x = 5,910.15