Finding the Fourth Proportional to 3,429.72, 5,143.81 and 964.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,429.72 : 5,143.81 = 964.78 : x
2. Step 2: Convert to fraction form
   3,429.72/5,143.81 = 964.78/x
3. Step 3: Cross multiply
   3,429.72x = 5,143.81 × 964.78
4. Step 4: Simplify right side
   3,429.72x = 4,962,645.01
5. Step 5: Solve for x
   x = 4,962,645.01/3,429.72
6. Step 6: Final answer
   x = 1,446.95