Finding the Fourth Proportional to 3,698.15, 5,103.45 and 2,019.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,698.15 : 5,103.45 = 2,019.59 : x
2. Step 2: Convert to fraction form
   3,698.15/5,103.45 = 2,019.59/x
3. Step 3: Cross multiply
   3,698.15x = 5,103.45 × 2,019.59
4. Step 4: Simplify right side
   3,698.15x = 10,306,870.21
5. Step 5: Solve for x
   x = 10,306,870.21/3,698.15
6. Step 6: Final answer
   x = 2,787.04