Finding the Fourth Proportional to 2,643.56, 3,965.39 and 695.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.56 : 3,965.39 = 695.69 : x
2. Step 2: Convert to fraction form
   2,643.56/3,965.39 = 695.69/x
3. Step 3: Cross multiply
   2,643.56x = 3,965.39 × 695.69
4. Step 4: Simplify right side
   2,643.56x = 2,758,678.69
5. Step 5: Solve for x
   x = 2,758,678.69/2,643.56
6. Step 6: Final answer
   x = 1,043.55