Finding the Fourth Proportional to 12,979, 17,911.22 and 7,674.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,979 : 17,911.22 = 7,674.32 : x
2. Step 2: Convert to fraction form
   12,979/17,911.22 = 7,674.32/x
3. Step 3: Cross multiply
   12,979x = 17,911.22 × 7,674.32
4. Step 4: Simplify right side
   12,979x = 137,456,433.87
5. Step 5: Solve for x
   x = 137,456,433.87/12,979
6. Step 6: Final answer
   x = 10,590.68