Finding the Fourth Proportional to 5,591.78, 8,389.94 and 2,819.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,591.78 : 8,389.94 = 2,819.25 : x
2. Step 2: Convert to fraction form
   5,591.78/8,389.94 = 2,819.25/x
3. Step 3: Cross multiply
   5,591.78x = 8,389.94 × 2,819.25
4. Step 4: Simplify right side
   5,591.78x = 23,653,345.39
5. Step 5: Solve for x
   x = 23,653,345.39/5,591.78
6. Step 6: Final answer
   x = 4,230.02