Finding the Fourth Proportional to 2,103.80, 2,904.22 and 1,219.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.80 : 2,904.22 = 1,219.43 : x
2. Step 2: Convert to fraction form
   2,103.80/2,904.22 = 1,219.43/x
3. Step 3: Cross multiply
   2,103.80x = 2,904.22 × 1,219.43
4. Step 4: Simplify right side
   2,103.80x = 3,541,501.78
5. Step 5: Solve for x
   x = 3,541,501.78/2,103.80
6. Step 6: Final answer
   x = 1,683.39