Finding the Fourth Proportional to 2,540.10, 3,503.04 and 1,643.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.10 : 3,503.04 = 1,643.40 : x
2. Step 2: Convert to fraction form
   2,540.10/3,503.04 = 1,643.40/x
3. Step 3: Cross multiply
   2,540.10x = 3,503.04 × 1,643.40
4. Step 4: Simplify right side
   2,540.10x = 5,756,895.94
5. Step 5: Solve for x
   x = 5,756,895.94/2,540.10
6. Step 6: Final answer
   x = 2,266.41