Finding the Fourth Proportional to 2,643.71, 3,964.59 and 1,183.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.71 : 3,964.59 = 1,183.86 : x
2. Step 2: Convert to fraction form
   2,643.71/3,964.59 = 1,183.86/x
3. Step 3: Cross multiply
   2,643.71x = 3,964.59 × 1,183.86
4. Step 4: Simplify right side
   2,643.71x = 4,693,519.52
5. Step 5: Solve for x
   x = 4,693,519.52/2,643.71
6. Step 6: Final answer
   x = 1,775.36