Finding the Fourth Proportional to 12,443.95, 17,175 and 7,142.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.95 : 17,175 = 7,142.23 : x
2. Step 2: Convert to fraction form
   12,443.95/17,175 = 7,142.23/x
3. Step 3: Cross multiply
   12,443.95x = 17,175 × 7,142.23
4. Step 4: Simplify right side
   12,443.95x = 122,667,800.25
5. Step 5: Solve for x
   x = 122,667,800.25/12,443.95
6. Step 6: Final answer
   x = 9,857.63