Finding the Fourth Proportional to 6,960.78, 10,439.55 and 3,259.49

Step by Step Solution

1. Step 1: Write the proportion equation
   6,960.78 : 10,439.55 = 3,259.49 : x
2. Step 2: Convert to fraction form
   6,960.78/10,439.55 = 3,259.49/x
3. Step 3: Cross multiply
   6,960.78x = 10,439.55 × 3,259.49
4. Step 4: Simplify right side
   6,960.78x = 34,027,556.63
5. Step 5: Solve for x
   x = 34,027,556.63/6,960.78
6. Step 6: Final answer
   x = 4,888.47