Finding the Fourth Proportional to 2,539.05, 3,809.12 and 1,078.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,539.05 : 3,809.12 = 1,078.89 : x
2. Step 2: Convert to fraction form
   2,539.05/3,809.12 = 1,078.89/x
3. Step 3: Cross multiply
   2,539.05x = 3,809.12 × 1,078.89
4. Step 4: Simplify right side
   2,539.05x = 4,109,616.08
5. Step 5: Solve for x
   x = 4,109,616.08/2,539.05
6. Step 6: Final answer
   x = 1,618.56