Finding the Fourth Proportional to 16,910.18, 23,345.37 and 12,659.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,910.18 : 23,345.37 = 12,659.72 : x
2. Step 2: Convert to fraction form
   16,910.18/23,345.37 = 12,659.72/x
3. Step 3: Cross multiply
   16,910.18x = 23,345.37 × 12,659.72
4. Step 4: Simplify right side
   16,910.18x = 295,545,730.77
5. Step 5: Solve for x
   x = 295,545,730.77/16,910.18
6. Step 6: Final answer
   x = 17,477.38