Finding the Fourth Proportional to 1,640.65, 2,264.06 and 894.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640.65 : 2,264.06 = 894.61 : x
2. Step 2: Convert to fraction form
   1,640.65/2,264.06 = 894.61/x
3. Step 3: Cross multiply
   1,640.65x = 2,264.06 × 894.61
4. Step 4: Simplify right side
   1,640.65x = 2,025,450.72
5. Step 5: Solve for x
   x = 2,025,450.72/1,640.65
6. Step 6: Final answer
   x = 1,234.55