Finding the Fourth Proportional to 2,645.93, 3,949.58 and 2,453.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.93 : 3,949.58 = 2,453.20 : x
2. Step 2: Convert to fraction form
   2,645.93/3,949.58 = 2,453.20/x
3. Step 3: Cross multiply
   2,645.93x = 3,949.58 × 2,453.20
4. Step 4: Simplify right side
   2,645.93x = 9,689,114.33
5. Step 5: Solve for x
   x = 9,689,114.33/2,645.93
6. Step 6: Final answer
   x = 3,661.89