Finding the Fourth Proportional to 3,419.59, 5,129.57 and 1,960.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,419.59 : 5,129.57 = 1,960.15 : x
2. Step 2: Convert to fraction form
   3,419.59/5,129.57 = 1,960.15/x
3. Step 3: Cross multiply
   3,419.59x = 5,129.57 × 1,960.15
4. Step 4: Simplify right side
   3,419.59x = 10,054,726.64
5. Step 5: Solve for x
   x = 10,054,726.64/3,419.59
6. Step 6: Final answer
   x = 2,940.33