Finding the Fourth Proportional to 4,640.32, 6,404.52 and 2,872.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,640.32 : 6,404.52 = 2,872.72 : x
2. Step 2: Convert to fraction form
   4,640.32/6,404.52 = 2,872.72/x
3. Step 3: Cross multiply
   4,640.32x = 6,404.52 × 2,872.72
4. Step 4: Simplify right side
   4,640.32x = 18,398,392.69
5. Step 5: Solve for x
   x = 18,398,392.69/4,640.32
6. Step 6: Final answer
   x = 3,964.90