Finding the Fourth Proportional to 2,965.39, 4,448.59 and 1,321.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,965.39 : 4,448.59 = 1,321.90 : x
2. Step 2: Convert to fraction form
   2,965.39/4,448.59 = 1,321.90/x
3. Step 3: Cross multiply
   2,965.39x = 4,448.59 × 1,321.90
4. Step 4: Simplify right side
   2,965.39x = 5,880,568.88
5. Step 5: Solve for x
   x = 5,880,568.88/2,965.39
6. Step 6: Final answer
   x = 1,983.07