Finding the Fourth Proportional to 2,485.83, 3,430.77 and 1,604.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.83 : 3,430.77 = 1,604.20 : x
2. Step 2: Convert to fraction form
   2,485.83/3,430.77 = 1,604.20/x
3. Step 3: Cross multiply
   2,485.83x = 3,430.77 × 1,604.20
4. Step 4: Simplify right side
   2,485.83x = 5,503,616.06
5. Step 5: Solve for x
   x = 5,503,616.06/2,485.83
6. Step 6: Final answer
   x = 2,214.00