Finding the Fourth Proportional to 12,857.96, 17,745.69 and 7,194.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,857.96 : 17,745.69 = 7,194.87 : x
2. Step 2: Convert to fraction form
   12,857.96/17,745.69 = 7,194.87/x
3. Step 3: Cross multiply
   12,857.96x = 17,745.69 × 7,194.87
4. Step 4: Simplify right side
   12,857.96x = 127,677,932.61
5. Step 5: Solve for x
   x = 127,677,932.61/12,857.96
6. Step 6: Final answer
   x = 9,929.88