Finding the Fourth Proportional to 2,504.67, 3,456.65 and 1,385.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,504.67 : 3,456.65 = 1,385.72 : x
2. Step 2: Convert to fraction form
   2,504.67/3,456.65 = 1,385.72/x
3. Step 3: Cross multiply
   2,504.67x = 3,456.65 × 1,385.72
4. Step 4: Simplify right side
   2,504.67x = 4,789,924.83
5. Step 5: Solve for x
   x = 4,789,924.83/2,504.67
6. Step 6: Final answer
   x = 1,912.40