Finding the Fourth Proportional to 12,122, 16,728.56 and 7,930.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,122 : 16,728.56 = 7,930.25 : x
2. Step 2: Convert to fraction form
   12,122/16,728.56 = 7,930.25/x
3. Step 3: Cross multiply
   12,122x = 16,728.56 × 7,930.25
4. Step 4: Simplify right side
   12,122x = 132,661,662.94
5. Step 5: Solve for x
   x = 132,661,662.94/12,122
6. Step 6: Final answer
   x = 10,943.88