Finding the Fourth Proportional to 8,819.57, 13,227.37 and 2,578.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,819.57 : 13,227.37 = 2,578.07 : x
2. Step 2: Convert to fraction form
   8,819.57/13,227.37 = 2,578.07/x
3. Step 3: Cross multiply
   8,819.57x = 13,227.37 × 2,578.07
4. Step 4: Simplify right side
   8,819.57x = 34,101,085.78
5. Step 5: Solve for x
   x = 34,101,085.78/8,819.57
6. Step 6: Final answer
   x = 3,866.52