Finding the Fourth Proportional to 3,697.78, 5,102.89 and 2,019.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,697.78 : 5,102.89 = 2,019.18 : x
2. Step 2: Convert to fraction form
   3,697.78/5,102.89 = 2,019.18/x
3. Step 3: Cross multiply
   3,697.78x = 5,102.89 × 2,019.18
4. Step 4: Simplify right side
   3,697.78x = 10,303,653.43
5. Step 5: Solve for x
   x = 10,303,653.43/3,697.78
6. Step 6: Final answer
   x = 2,786.44