Finding the Fourth Proportional to 1,640.32, 2,456.52 and 1,023.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640.32 : 2,456.52 = 1,023.25 : x
2. Step 2: Convert to fraction form
   1,640.32/2,456.52 = 1,023.25/x
3. Step 3: Cross multiply
   1,640.32x = 2,456.52 × 1,023.25
4. Step 4: Simplify right side
   1,640.32x = 2,513,627.95
5. Step 5: Solve for x
   x = 2,513,627.95/1,640.32
6. Step 6: Final answer
   x = 1,532.40