Finding the Fourth Proportional to 12,765.24, 19,150.56 and 6,443.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,765.24 : 19,150.56 = 6,443.72 : x
2. Step 2: Convert to fraction form
   12,765.24/19,150.56 = 6,443.72/x
3. Step 3: Cross multiply
   12,765.24x = 19,150.56 × 6,443.72
4. Step 4: Simplify right side
   12,765.24x = 123,400,846.48
5. Step 5: Solve for x
   x = 123,400,846.48/12,765.24
6. Step 6: Final answer
   x = 9,666.94