Finding the Fourth Proportional to 13,282.77, 19,919.49 and 3,920.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,282.77 : 19,919.49 = 3,920.28 : x
2. Step 2: Convert to fraction form
   13,282.77/19,919.49 = 3,920.28/x
3. Step 3: Cross multiply
   13,282.77x = 19,919.49 × 3,920.28
4. Step 4: Simplify right side
   13,282.77x = 78,089,978.26
5. Step 5: Solve for x
   x = 78,089,978.26/13,282.77
6. Step 6: Final answer
   x = 5,879.04