Finding the Fourth Proportional to 2,620.72, 3,617.26 and 1,625.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.72 : 3,617.26 = 1,625.40 : x
2. Step 2: Convert to fraction form
   2,620.72/3,617.26 = 1,625.40/x
3. Step 3: Cross multiply
   2,620.72x = 3,617.26 × 1,625.40
4. Step 4: Simplify right side
   2,620.72x = 5,879,494.40
5. Step 5: Solve for x
   x = 5,879,494.40/2,620.72
6. Step 6: Final answer
   x = 2,243.47