Finding the Fourth Proportional to 16,801.38, 25,205.83 and 5,115.51

Step by Step Solution

1. Step 1: Write the proportion equation
   16,801.38 : 25,205.83 = 5,115.51 : x
2. Step 2: Convert to fraction form
   16,801.38/25,205.83 = 5,115.51/x
3. Step 3: Cross multiply
   16,801.38x = 25,205.83 × 5,115.51
4. Step 4: Simplify right side
   16,801.38x = 128,940,662.63
5. Step 5: Solve for x
   x = 128,940,662.63/16,801.38
6. Step 6: Final answer
   x = 7,674.41