Finding the Fourth Proportional to 6,830.56, 9,419.72 and 6,321.48

Step by Step Solution

1. Step 1: Write the proportion equation
   6,830.56 : 9,419.72 = 6,321.48 : x
2. Step 2: Convert to fraction form
   6,830.56/9,419.72 = 6,321.48/x
3. Step 3: Cross multiply
   6,830.56x = 9,419.72 × 6,321.48
4. Step 4: Simplify right side
   6,830.56x = 59,546,571.59
5. Step 5: Solve for x
   x = 59,546,571.59/6,830.56
6. Step 6: Final answer
   x = 8,717.67