Finding the Fourth Proportional to 12,423.57, 17,144.70 and 7,118.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,423.57 : 17,144.70 = 7,118.38 : x
2. Step 2: Convert to fraction form
   12,423.57/17,144.70 = 7,118.38/x
3. Step 3: Cross multiply
   12,423.57x = 17,144.70 × 7,118.38
4. Step 4: Simplify right side
   12,423.57x = 122,042,368.27
5. Step 5: Solve for x
   x = 122,042,368.27/12,423.57
6. Step 6: Final answer
   x = 9,823.45