Finding the Fourth Proportional to 12,280.74, 18,424.04 and 3,961.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,280.74 : 18,424.04 = 3,961.55 : x
2. Step 2: Convert to fraction form
   12,280.74/18,424.04 = 3,961.55/x
3. Step 3: Cross multiply
   12,280.74x = 18,424.04 × 3,961.55
4. Step 4: Simplify right side
   12,280.74x = 72,987,643.73
5. Step 5: Solve for x
   x = 72,987,643.73/12,280.74
6. Step 6: Final answer
   x = 5,943.26