Finding the Fourth Proportional to 2,335.54, 3,223.18 and 1,287.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,335.54 : 3,223.18 = 1,287.60 : x
2. Step 2: Convert to fraction form
   2,335.54/3,223.18 = 1,287.60/x
3. Step 3: Cross multiply
   2,335.54x = 3,223.18 × 1,287.60
4. Step 4: Simplify right side
   2,335.54x = 4,150,166.57
5. Step 5: Solve for x
   x = 4,150,166.57/2,335.54
6. Step 6: Final answer
   x = 1,776.96