Finding the Fourth Proportional to 2,335.38, 3,222.89 and 1,287.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,335.38 : 3,222.89 = 1,287.51 : x
2. Step 2: Convert to fraction form
   2,335.38/3,222.89 = 1,287.51/x
3. Step 3: Cross multiply
   2,335.38x = 3,222.89 × 1,287.51
4. Step 4: Simplify right side
   2,335.38x = 4,149,480.55
5. Step 5: Solve for x
   x = 4,149,480.55/2,335.38
6. Step 6: Final answer
   x = 1,776.79