Finding the Fourth Proportional to 2,251.57, 3,107.69 and 1,320.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,251.57 : 3,107.69 = 1,320.37 : x
2. Step 2: Convert to fraction form
   2,251.57/3,107.69 = 1,320.37/x
3. Step 3: Cross multiply
   2,251.57x = 3,107.69 × 1,320.37
4. Step 4: Simplify right side
   2,251.57x = 4,103,294.04
5. Step 5: Solve for x
   x = 4,103,294.04/2,251.57
6. Step 6: Final answer
   x = 1,822.41