Finding the Fourth Proportional to 3,698.53, 5,104.01 and 2,019.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,698.53 : 5,104.01 = 2,019.99 : x
2. Step 2: Convert to fraction form
   3,698.53/5,104.01 = 2,019.99/x
3. Step 3: Cross multiply
   3,698.53x = 5,104.01 × 2,019.99
4. Step 4: Simplify right side
   3,698.53x = 10,310,023.64
5. Step 5: Solve for x
   x = 10,310,023.64/3,698.53
6. Step 6: Final answer
   x = 2,787.60