Finding the Fourth Proportional to 4,302, 6,456.20 and 3,150.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,302 : 6,456.20 = 3,150.72 : x
2. Step 2: Convert to fraction form
   4,302/6,456.20 = 3,150.72/x
3. Step 3: Cross multiply
   4,302x = 6,456.20 × 3,150.72
4. Step 4: Simplify right side
   4,302x = 20,341,678.46
5. Step 5: Solve for x
   x = 20,341,678.46/4,302
6. Step 6: Final answer
   x = 4,728.42