Finding the Fourth Proportional to 12,174.16, 16,799.91 and 7,639.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,174.16 : 16,799.91 = 7,639.29 : x
2. Step 2: Convert to fraction form
   12,174.16/16,799.91 = 7,639.29/x
3. Step 3: Cross multiply
   12,174.16x = 16,799.91 × 7,639.29
4. Step 4: Simplify right side
   12,174.16x = 128,339,262.27
5. Step 5: Solve for x
   x = 128,339,262.27/12,174.16
6. Step 6: Final answer
   x = 10,541.94