Finding the Fourth Proportional to 2,103.78, 2,903.49 and 1,219.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.78 : 2,903.49 = 1,219.86 : x
2. Step 2: Convert to fraction form
   2,103.78/2,903.49 = 1,219.86/x
3. Step 3: Cross multiply
   2,103.78x = 2,903.49 × 1,219.86
4. Step 4: Simplify right side
   2,103.78x = 3,541,851.31
5. Step 5: Solve for x
   x = 3,541,851.31/2,103.78
6. Step 6: Final answer
   x = 1,683.57