Finding the Fourth Proportional to 2,162.10, 3,243.20 and 775.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.10 : 3,243.20 = 775.53 : x
2. Step 2: Convert to fraction form
   2,162.10/3,243.20 = 775.53/x
3. Step 3: Cross multiply
   2,162.10x = 3,243.20 × 775.53
4. Step 4: Simplify right side
   2,162.10x = 2,515,198.90
5. Step 5: Solve for x
   x = 2,515,198.90/2,162.10
6. Step 6: Final answer
   x = 1,163.31