Finding the Fourth Proportional to 16,857.96, 23,256.78 and 12,373.98

Step by Step Solution

1. Step 1: Write the proportion equation
   16,857.96 : 23,256.78 = 12,373.98 : x
2. Step 2: Convert to fraction form
   16,857.96/23,256.78 = 12,373.98/x
3. Step 3: Cross multiply
   16,857.96x = 23,256.78 × 12,373.98
4. Step 4: Simplify right side
   16,857.96x = 287,778,930.58
5. Step 5: Solve for x
   x = 287,778,930.58/16,857.96
6. Step 6: Final answer
   x = 17,070.80