Finding the Fourth Proportional to 2,560.46, 3,843.16 and 1,328.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560.46 : 3,843.16 = 1,328.72 : x
2. Step 2: Convert to fraction form
   2,560.46/3,843.16 = 1,328.72/x
3. Step 3: Cross multiply
   2,560.46x = 3,843.16 × 1,328.72
4. Step 4: Simplify right side
   2,560.46x = 5,106,483.56
5. Step 5: Solve for x
   x = 5,106,483.56/2,560.46
6. Step 6: Final answer
   x = 1,994.36