Finding the Fourth Proportional to 3,429.35, 5,143.21 and 964.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,429.35 : 5,143.21 = 964.40 : x
2. Step 2: Convert to fraction form
   3,429.35/5,143.21 = 964.40/x
3. Step 3: Cross multiply
   3,429.35x = 5,143.21 × 964.40
4. Step 4: Simplify right side
   3,429.35x = 4,960,111.72
5. Step 5: Solve for x
   x = 4,960,111.72/3,429.35
6. Step 6: Final answer
   x = 1,446.37