Finding the Fourth Proportional to 16,789.58, 23,159.04 and 12,478.83

Step by Step Solution

1. Step 1: Write the proportion equation
   16,789.58 : 23,159.04 = 12,478.83 : x
2. Step 2: Convert to fraction form
   16,789.58/23,159.04 = 12,478.83/x
3. Step 3: Cross multiply
   16,789.58x = 23,159.04 × 12,478.83
4. Step 4: Simplify right side
   16,789.58x = 288,997,819.98
5. Step 5: Solve for x
   x = 288,997,819.98/16,789.58
6. Step 6: Final answer
   x = 17,212.93