Finding the Fourth Proportional to 3,960.78, 5,476.31 and 3,468.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,960.78 : 5,476.31 = 3,468.70 : x
2. Step 2: Convert to fraction form
   3,960.78/5,476.31 = 3,468.70/x
3. Step 3: Cross multiply
   3,960.78x = 5,476.31 × 3,468.70
4. Step 4: Simplify right side
   3,960.78x = 18,995,676.50
5. Step 5: Solve for x
   x = 18,995,676.50/3,960.78
6. Step 6: Final answer
   x = 4,795.94