Finding the Fourth Proportional to 2,640.54, 3,643.72 and 2,359.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.54 : 3,643.72 = 2,359.87 : x
2. Step 2: Convert to fraction form
   2,640.54/3,643.72 = 2,359.87/x
3. Step 3: Cross multiply
   2,640.54x = 3,643.72 × 2,359.87
4. Step 4: Simplify right side
   2,640.54x = 8,598,705.52
5. Step 5: Solve for x
   x = 8,598,705.52/2,640.54
6. Step 6: Final answer
   x = 3,256.42