Finding the Fourth Proportional to 2,103.52, 2,902.88 and 1,219.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.52 : 2,902.88 = 1,219.40 : x
2. Step 2: Convert to fraction form
   2,103.52/2,902.88 = 1,219.40/x
3. Step 3: Cross multiply
   2,103.52x = 2,902.88 × 1,219.40
4. Step 4: Simplify right side
   2,103.52x = 3,539,771.87
5. Step 5: Solve for x
   x = 3,539,771.87/2,103.52
6. Step 6: Final answer
   x = 1,682.78