Finding the Fourth Proportional to 2,018.56, 3,025.68 and 864.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.56 : 3,025.68 = 864.40 : x
2. Step 2: Convert to fraction form
   2,018.56/3,025.68 = 864.40/x
3. Step 3: Cross multiply
   2,018.56x = 3,025.68 × 864.40
4. Step 4: Simplify right side
   2,018.56x = 2,615,397.79
5. Step 5: Solve for x
   x = 2,615,397.79/2,018.56
6. Step 6: Final answer
   x = 1,295.68