Finding the Fourth Proportional to 2,563.12, 3,846.76 and 1,330.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,563.12 : 3,846.76 = 1,330.88 : x
2. Step 2: Convert to fraction form
   2,563.12/3,846.76 = 1,330.88/x
3. Step 3: Cross multiply
   2,563.12x = 3,846.76 × 1,330.88
4. Step 4: Simplify right side
   2,563.12x = 5,119,556.72
5. Step 5: Solve for x
   x = 5,119,556.72/2,563.12
6. Step 6: Final answer
   x = 1,997.40