Finding the Fourth Proportional to 13,280.28, 19,923.83 and 3,919.92

Step by Step Solution

1. Step 1: Write the proportion equation
   13,280.28 : 19,923.83 = 3,919.92 : x
2. Step 2: Convert to fraction form
   13,280.28/19,923.83 = 3,919.92/x
3. Step 3: Cross multiply
   13,280.28x = 19,923.83 × 3,919.92
4. Step 4: Simplify right side
   13,280.28x = 78,099,819.69
5. Step 5: Solve for x
   x = 78,099,819.69/13,280.28
6. Step 6: Final answer
   x = 5,880.89