Finding the Fourth Proportional to 2,016.21, 3,019.70 and 1,813.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.21 : 3,019.70 = 1,813.23 : x
2. Step 2: Convert to fraction form
   2,016.21/3,019.70 = 1,813.23/x
3. Step 3: Cross multiply
   2,016.21x = 3,019.70 × 1,813.23
4. Step 4: Simplify right side
   2,016.21x = 5,475,401.56
5. Step 5: Solve for x
   x = 5,475,401.56/2,016.21
6. Step 6: Final answer
   x = 2,715.69