Finding the Fourth Proportional to 2,018.50, 3,026.12 and 865.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.50 : 3,026.12 = 865.06 : x
2. Step 2: Convert to fraction form
   2,018.50/3,026.12 = 865.06/x
3. Step 3: Cross multiply
   2,018.50x = 3,026.12 × 865.06
4. Step 4: Simplify right side
   2,018.50x = 2,617,763.48
5. Step 5: Solve for x
   x = 2,617,763.48/2,018.50
6. Step 6: Final answer
   x = 1,296.89