Finding the Fourth Proportional to 2,504.61, 3,456.41 and 1,385.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,504.61 : 3,456.41 = 1,385.65 : x
2. Step 2: Convert to fraction form
   2,504.61/3,456.41 = 1,385.65/x
3. Step 3: Cross multiply
   2,504.61x = 3,456.41 × 1,385.65
4. Step 4: Simplify right side
   2,504.61x = 4,789,374.52
5. Step 5: Solve for x
   x = 4,789,374.52/2,504.61
6. Step 6: Final answer
   x = 1,912.22