Finding the Fourth Proportional to 3,419.72, 4,719.46 and 2,578.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,419.72 : 4,719.46 = 2,578.94 : x
2. Step 2: Convert to fraction form
   3,419.72/4,719.46 = 2,578.94/x
3. Step 3: Cross multiply
   3,419.72x = 4,719.46 × 2,578.94
4. Step 4: Simplify right side
   3,419.72x = 12,171,204.17
5. Step 5: Solve for x
   x = 12,171,204.17/3,419.72
6. Step 6: Final answer
   x = 3,559.12