Finding the Fourth Proportional to 3,698.42, 5,103.86 and 2,019.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,698.42 : 5,103.86 = 2,019.87 : x
2. Step 2: Convert to fraction form
   3,698.42/5,103.86 = 2,019.87/x
3. Step 3: Cross multiply
   3,698.42x = 5,103.86 × 2,019.87
4. Step 4: Simplify right side
   3,698.42x = 10,309,123.60
5. Step 5: Solve for x
   x = 10,309,123.60/3,698.42
6. Step 6: Final answer
   x = 2,787.44