Finding the Fourth Proportional to 2,643.81, 3,964.53 and 794.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.81 : 3,964.53 = 794.57 : x
2. Step 2: Convert to fraction form
   2,643.81/3,964.53 = 794.57/x
3. Step 3: Cross multiply
   2,643.81x = 3,964.53 × 794.57
4. Step 4: Simplify right side
   2,643.81x = 3,150,076.78
5. Step 5: Solve for x
   x = 3,150,076.78/2,643.81
6. Step 6: Final answer
   x = 1,191.49