Finding the Fourth Proportional to 2,563.20, 3,841.61 and 1,329.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,563.20 : 3,841.61 = 1,329.89 : x
2. Step 2: Convert to fraction form
   2,563.20/3,841.61 = 1,329.89/x
3. Step 3: Cross multiply
   2,563.20x = 3,841.61 × 1,329.89
4. Step 4: Simplify right side
   2,563.20x = 5,108,892.87
5. Step 5: Solve for x
   x = 5,108,892.87/2,563.20
6. Step 6: Final answer
   x = 1,993.17