Finding the Fourth Proportional to 13,141.24, 19,711.62 and 3,280.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,141.24 : 19,711.62 = 3,280.60 : x
2. Step 2: Convert to fraction form
   13,141.24/19,711.62 = 3,280.60/x
3. Step 3: Cross multiply
   13,141.24x = 19,711.62 × 3,280.60
4. Step 4: Simplify right side
   13,141.24x = 64,665,940.57
5. Step 5: Solve for x
   x = 64,665,940.57/13,141.24
6. Step 6: Final answer
   x = 4,920.84