Finding the Fourth Proportional to 12,270.56, 18,408.47 and 3,951.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,270.56 : 18,408.47 = 3,951.05 : x
2. Step 2: Convert to fraction form
   12,270.56/18,408.47 = 3,951.05/x
3. Step 3: Cross multiply
   12,270.56x = 18,408.47 × 3,951.05
4. Step 4: Simplify right side
   12,270.56x = 72,732,673.60
5. Step 5: Solve for x
   x = 72,732,673.60/12,270.56
6. Step 6: Final answer
   x = 5,927.42