Finding the Fourth Proportional to 8,979.57, 13,443.75 and 7,133.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,979.57 : 13,443.75 = 7,133.31 : x
2. Step 2: Convert to fraction form
   8,979.57/13,443.75 = 7,133.31/x
3. Step 3: Cross multiply
   8,979.57x = 13,443.75 × 7,133.31
4. Step 4: Simplify right side
   8,979.57x = 95,898,436.31
5. Step 5: Solve for x
   x = 95,898,436.31/8,979.57
6. Step 6: Final answer
   x = 10,679.62