Finding the Fourth Proportional to 2,640.45, 3,643.88 and 1,461.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.45 : 3,643.88 = 1,461.57 : x
2. Step 2: Convert to fraction form
   2,640.45/3,643.88 = 1,461.57/x
3. Step 3: Cross multiply
   2,640.45x = 3,643.88 × 1,461.57
4. Step 4: Simplify right side
   2,640.45x = 5,325,785.69
5. Step 5: Solve for x
   x = 5,325,785.69/2,640.45
6. Step 6: Final answer
   x = 2,017.00