Finding the Fourth Proportional to 2,350.43, 3,243.56 and 1,288.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,350.43 : 3,243.56 = 1,288.20 : x
2. Step 2: Convert to fraction form
   2,350.43/3,243.56 = 1,288.20/x
3. Step 3: Cross multiply
   2,350.43x = 3,243.56 × 1,288.20
4. Step 4: Simplify right side
   2,350.43x = 4,178,347.55
5. Step 5: Solve for x
   x = 4,178,347.55/2,350.43
6. Step 6: Final answer
   x = 1,777.69