Finding the Fourth Proportional to 2,504.39, 3,457.31 and 1,620.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,504.39 : 3,457.31 = 1,620.90 : x
2. Step 2: Convert to fraction form
   2,504.39/3,457.31 = 1,620.90/x
3. Step 3: Cross multiply
   2,504.39x = 3,457.31 × 1,620.90
4. Step 4: Simplify right side
   2,504.39x = 5,603,945.67
5. Step 5: Solve for x
   x = 5,603,945.67/2,504.39
6. Step 6: Final answer
   x = 2,237.65