Finding the Fourth Proportional to 16,708.72, 23,058.52 and 9,155.71

Step by Step Solution

1. Step 1: Write the proportion equation
   16,708.72 : 23,058.52 = 9,155.71 : x
2. Step 2: Convert to fraction form
   16,708.72/23,058.52 = 9,155.71/x
3. Step 3: Cross multiply
   16,708.72x = 23,058.52 × 9,155.71
4. Step 4: Simplify right side
   16,708.72x = 211,117,122.15
5. Step 5: Solve for x
   x = 211,117,122.15/16,708.72
6. Step 6: Final answer
   x = 12,635.15