Finding the Fourth Proportional to 3,491.89, 5,233.57 and 1,640.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,491.89 : 5,233.57 = 1,640.53 : x
2. Step 2: Convert to fraction form
   3,491.89/5,233.57 = 1,640.53/x
3. Step 3: Cross multiply
   3,491.89x = 5,233.57 × 1,640.53
4. Step 4: Simplify right side
   3,491.89x = 8,585,828.59
5. Step 5: Solve for x
   x = 8,585,828.59/3,491.89
6. Step 6: Final answer
   x = 2,458.79