Finding the Fourth Proportional to 2,786.88, 4,176.72 and 1,326.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,786.88 : 4,176.72 = 1,326.48 : x
2. Step 2: Convert to fraction form
   2,786.88/4,176.72 = 1,326.48/x
3. Step 3: Cross multiply
   2,786.88x = 4,176.72 × 1,326.48
4. Step 4: Simplify right side
   2,786.88x = 5,540,335.55
5. Step 5: Solve for x
   x = 5,540,335.55/2,786.88
6. Step 6: Final answer
   x = 1,988.01