Finding the Fourth Proportional to 1,018.92, 1,527.72 and 864.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.92 : 1,527.72 = 864.18 : x
2. Step 2: Convert to fraction form
   1,018.92/1,527.72 = 864.18/x
3. Step 3: Cross multiply
   1,018.92x = 1,527.72 × 864.18
4. Step 4: Simplify right side
   1,018.92x = 1,320,225.07
5. Step 5: Solve for x
   x = 1,320,225.07/1,018.92
6. Step 6: Final answer
   x = 1,295.71