Finding the Fourth Proportional to 12,280.56, 18,423.47 and 3,961.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,280.56 : 18,423.47 = 3,961.05 : x
2. Step 2: Convert to fraction form
   12,280.56/18,423.47 = 3,961.05/x
3. Step 3: Cross multiply
   12,280.56x = 18,423.47 × 3,961.05
4. Step 4: Simplify right side
   12,280.56x = 72,976,285.84
5. Step 5: Solve for x
   x = 72,976,285.84/12,280.56
6. Step 6: Final answer
   x = 5,942.42