Finding the Fourth Proportional to 12,942.57, 17,860.65 and 7,353.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,942.57 : 17,860.65 = 7,353.57 : x
2. Step 2: Convert to fraction form
   12,942.57/17,860.65 = 7,353.57/x
3. Step 3: Cross multiply
   12,942.57x = 17,860.65 × 7,353.57
4. Step 4: Simplify right side
   12,942.57x = 131,339,540.02
5. Step 5: Solve for x
   x = 131,339,540.02/12,942.57
6. Step 6: Final answer
   x = 10,147.87