Finding the Fourth Proportional to 2,019.82, 3,030.94 and 865.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.82 : 3,030.94 = 865.57 : x
2. Step 2: Convert to fraction form
   2,019.82/3,030.94 = 865.57/x
3. Step 3: Cross multiply
   2,019.82x = 3,030.94 × 865.57
4. Step 4: Simplify right side
   2,019.82x = 2,623,471.25
5. Step 5: Solve for x
   x = 2,623,471.25/2,019.82
6. Step 6: Final answer
   x = 1,298.87