Finding the Fourth Proportional to 16,858.86, 23,251.20 and 12,659.82

Step by Step Solution

1. Step 1: Write the proportion equation
   16,858.86 : 23,251.20 = 12,659.82 : x
2. Step 2: Convert to fraction form
   16,858.86/23,251.20 = 12,659.82/x
3. Step 3: Cross multiply
   16,858.86x = 23,251.20 × 12,659.82
4. Step 4: Simplify right side
   16,858.86x = 294,356,006.78
5. Step 5: Solve for x
   x = 294,356,006.78/16,858.86
6. Step 6: Final answer
   x = 17,460.02