Finding the Fourth Proportional to 2,605.65, 3,596.43 and 2,185.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,605.65 : 3,596.43 = 2,185.35 : x
2. Step 2: Convert to fraction form
   2,605.65/3,596.43 = 2,185.35/x
3. Step 3: Cross multiply
   2,605.65x = 3,596.43 × 2,185.35
4. Step 4: Simplify right side
   2,605.65x = 7,859,458.30
5. Step 5: Solve for x
   x = 7,859,458.30/2,605.65
6. Step 6: Final answer
   x = 3,016.31