Finding the Fourth Proportional to 2,409.92, 3,614.72 and 678.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,409.92 : 3,614.72 = 678.56 : x
2. Step 2: Convert to fraction form
   2,409.92/3,614.72 = 678.56/x
3. Step 3: Cross multiply
   2,409.92x = 3,614.72 × 678.56
4. Step 4: Simplify right side
   2,409.92x = 2,452,804.40
5. Step 5: Solve for x
   x = 2,452,804.40/2,409.92
6. Step 6: Final answer
   x = 1,017.79