Finding the Fourth Proportional to 2,643.98, 3,965.67 and 696.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.98 : 3,965.67 = 696.34 : x
2. Step 2: Convert to fraction form
   2,643.98/3,965.67 = 696.34/x
3. Step 3: Cross multiply
   2,643.98x = 3,965.67 × 696.34
4. Step 4: Simplify right side
   2,643.98x = 2,761,434.82
5. Step 5: Solve for x
   x = 2,761,434.82/2,643.98
6. Step 6: Final answer
   x = 1,044.42