Finding the Fourth Proportional to 2,103.89, 2,903.31 and 1,219.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.89 : 2,903.31 = 1,219.64 : x
2. Step 2: Convert to fraction form
   2,103.89/2,903.31 = 1,219.64/x
3. Step 3: Cross multiply
   2,103.89x = 2,903.31 × 1,219.64
4. Step 4: Simplify right side
   2,103.89x = 3,540,978.49
5. Step 5: Solve for x
   x = 3,540,978.49/2,103.89
6. Step 6: Final answer
   x = 1,683.07