Finding the Fourth Proportional to 2,104.81, 2,903.31 and 1,220.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.81 : 2,903.31 = 1,220.29 : x
2. Step 2: Convert to fraction form
   2,104.81/2,903.31 = 1,220.29/x
3. Step 3: Cross multiply
   2,104.81x = 2,903.31 × 1,220.29
4. Step 4: Simplify right side
   2,104.81x = 3,542,872.90
5. Step 5: Solve for x
   x = 3,542,872.90/2,104.81
6. Step 6: Final answer
   x = 1,683.23