Finding the Fourth Proportional to 2,504.70, 3,456.46 and 1,385.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,504.70 : 3,456.46 = 1,385.63 : x
2. Step 2: Convert to fraction form
   2,504.70/3,456.46 = 1,385.63/x
3. Step 3: Cross multiply
   2,504.70x = 3,456.46 × 1,385.63
4. Step 4: Simplify right side
   2,504.70x = 4,789,372.08
5. Step 5: Solve for x
   x = 4,789,372.08/2,504.70
6. Step 6: Final answer
   x = 1,912.15