Finding the Fourth Proportional to 2,504.88, 3,456.84 and 1,385.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,504.88 : 3,456.84 = 1,385.92 : x
2. Step 2: Convert to fraction form
   2,504.88/3,456.84 = 1,385.92/x
3. Step 3: Cross multiply
   2,504.88x = 3,456.84 × 1,385.92
4. Step 4: Simplify right side
   2,504.88x = 4,790,903.69
5. Step 5: Solve for x
   x = 4,790,903.69/2,504.88
6. Step 6: Final answer
   x = 1,912.63