Finding the Fourth Proportional to 2,104.34, 2,903.55 and 1,220.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.34 : 2,903.55 = 1,220.09 : x
2. Step 2: Convert to fraction form
   2,104.34/2,903.55 = 1,220.09/x
3. Step 3: Cross multiply
   2,104.34x = 2,903.55 × 1,220.09
4. Step 4: Simplify right side
   2,104.34x = 3,542,592.32
5. Step 5: Solve for x
   x = 3,542,592.32/2,104.34
6. Step 6: Final answer
   x = 1,683.47