Finding the Fourth Proportional to 2,563.27, 3,836.69 and 1,328.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,563.27 : 3,836.69 = 1,328.98 : x
2. Step 2: Convert to fraction form
   2,563.27/3,836.69 = 1,328.98/x
3. Step 3: Cross multiply
   2,563.27x = 3,836.69 × 1,328.98
4. Step 4: Simplify right side
   2,563.27x = 5,098,894.75
5. Step 5: Solve for x
   x = 5,098,894.75/2,563.27
6. Step 6: Final answer
   x = 1,989.21