Finding the Fourth Proportional to 2,103.82, 2,903.20 and 1,219.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.82 : 2,903.20 = 1,219.65 : x
2. Step 2: Convert to fraction form
   2,103.82/2,903.20 = 1,219.65/x
3. Step 3: Cross multiply
   2,103.82x = 2,903.20 × 1,219.65
4. Step 4: Simplify right side
   2,103.82x = 3,540,887.88
5. Step 5: Solve for x
   x = 3,540,887.88/2,103.82
6. Step 6: Final answer
   x = 1,683.08