Finding the Fourth Proportional to 2,104.46, 2,904.50 and 1,220.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.46 : 2,904.50 = 1,220.09 : x
2. Step 2: Convert to fraction form
   2,104.46/2,904.50 = 1,220.09/x
3. Step 3: Cross multiply
   2,104.46x = 2,904.50 × 1,220.09
4. Step 4: Simplify right side
   2,104.46x = 3,543,745.30
5. Step 5: Solve for x
   x = 3,543,745.30/2,104.46
6. Step 6: Final answer
   x = 1,683.92