Finding the Fourth Proportional to 1,640.50, 2,256.12 and 1,304.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640.50 : 2,256.12 = 1,304.98 : x
2. Step 2: Convert to fraction form
   1,640.50/2,256.12 = 1,304.98/x
3. Step 3: Cross multiply
   1,640.50x = 2,256.12 × 1,304.98
4. Step 4: Simplify right side
   1,640.50x = 2,944,191.48
5. Step 5: Solve for x
   x = 2,944,191.48/1,640.50
6. Step 6: Final answer
   x = 1,794.69