Finding the Fourth Proportional to 12,057.76, 16,640.74 and 7,022.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,057.76 : 16,640.74 = 7,022.45 : x
2. Step 2: Convert to fraction form
   12,057.76/16,640.74 = 7,022.45/x
3. Step 3: Cross multiply
   12,057.76x = 16,640.74 × 7,022.45
4. Step 4: Simplify right side
   12,057.76x = 116,858,721.39
5. Step 5: Solve for x
   x = 116,858,721.39/12,057.76
6. Step 6: Final answer
   x = 9,691.58