Finding the Fourth Proportional to 6,580.24, 9,872.28 and 3,112.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,580.24 : 9,872.28 = 3,112.72 : x
2. Step 2: Convert to fraction form
   6,580.24/9,872.28 = 3,112.72/x
3. Step 3: Cross multiply
   6,580.24x = 9,872.28 × 3,112.72
4. Step 4: Simplify right side
   6,580.24x = 30,729,643.40
5. Step 5: Solve for x
   x = 30,729,643.40/6,580.24
6. Step 6: Final answer
   x = 4,669.99