Finding the Fourth Proportional to 16,947.51, 23,389.61 and 9,872.57

Step by Step Solution

1. Step 1: Write the proportion equation
   16,947.51 : 23,389.61 = 9,872.57 : x
2. Step 2: Convert to fraction form
   16,947.51/23,389.61 = 9,872.57/x
3. Step 3: Cross multiply
   16,947.51x = 23,389.61 × 9,872.57
4. Step 4: Simplify right side
   16,947.51x = 230,915,395.69
5. Step 5: Solve for x
   x = 230,915,395.69/16,947.51
6. Step 6: Final answer
   x = 13,625.33