Finding the Fourth Proportional to 2,335.64, 3,223.10 and 1,287.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,335.64 : 3,223.10 = 1,287.69 : x
2. Step 2: Convert to fraction form
   2,335.64/3,223.10 = 1,287.69/x
3. Step 3: Cross multiply
   2,335.64x = 3,223.10 × 1,287.69
4. Step 4: Simplify right side
   2,335.64x = 4,150,347.20
5. Step 5: Solve for x
   x = 4,150,347.20/2,335.64
6. Step 6: Final answer
   x = 1,776.97