Finding the Fourth Proportional to 2,615.81, 3,610.23 and 2,019.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.81 : 3,610.23 = 2,019.17 : x
2. Step 2: Convert to fraction form
   2,615.81/3,610.23 = 2,019.17/x
3. Step 3: Cross multiply
   2,615.81x = 3,610.23 × 2,019.17
4. Step 4: Simplify right side
   2,615.81x = 7,289,650.06
5. Step 5: Solve for x
   x = 7,289,650.06/2,615.81
6. Step 6: Final answer
   x = 2,786.77