Finding the Fourth Proportional to 2,335.66, 3,223.22 and 1,287.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,335.66 : 3,223.22 = 1,287.72 : x
2. Step 2: Convert to fraction form
   2,335.66/3,223.22 = 1,287.72/x
3. Step 3: Cross multiply
   2,335.66x = 3,223.22 × 1,287.72
4. Step 4: Simplify right side
   2,335.66x = 4,150,604.86
5. Step 5: Solve for x
   x = 4,150,604.86/2,335.66
6. Step 6: Final answer
   x = 1,777.06