Finding the Fourth Proportional to 3,865.89, 5,802.64 and 2,018.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,865.89 : 5,802.64 = 2,018.49 : x
2. Step 2: Convert to fraction form
   3,865.89/5,802.64 = 2,018.49/x
3. Step 3: Cross multiply
   3,865.89x = 5,802.64 × 2,018.49
4. Step 4: Simplify right side
   3,865.89x = 11,712,544.01
5. Step 5: Solve for x
   x = 11,712,544.01/3,865.89
6. Step 6: Final answer
   x = 3,029.71