Finding the Fourth Proportional to 1,640.50, 2,263.89 and 894.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640.50 : 2,263.89 = 894.45 : x
2. Step 2: Convert to fraction form
   1,640.50/2,263.89 = 894.45/x
3. Step 3: Cross multiply
   1,640.50x = 2,263.89 × 894.45
4. Step 4: Simplify right side
   1,640.50x = 2,024,944.90
5. Step 5: Solve for x
   x = 2,024,944.90/1,640.50
6. Step 6: Final answer
   x = 1,234.35