Finding the Fourth Proportional to 2,504.27, 3,455.81 and 1,385.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,504.27 : 3,455.81 = 1,385.21 : x
2. Step 2: Convert to fraction form
   2,504.27/3,455.81 = 1,385.21/x
3. Step 3: Cross multiply
   2,504.27x = 3,455.81 × 1,385.21
4. Step 4: Simplify right side
   2,504.27x = 4,786,998.37
5. Step 5: Solve for x
   x = 4,786,998.37/2,504.27
6. Step 6: Final answer
   x = 1,911.54