Finding the Fourth Proportional to 3,405.57, 4,696.56 and 2,209.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,405.57 : 4,696.56 = 2,209.30 : x
2. Step 2: Convert to fraction form
   3,405.57/4,696.56 = 2,209.30/x
3. Step 3: Cross multiply
   3,405.57x = 4,696.56 × 2,209.30
4. Step 4: Simplify right side
   3,405.57x = 10,376,110.01
5. Step 5: Solve for x
   x = 10,376,110.01/3,405.57
6. Step 6: Final answer
   x = 3,046.81