Finding the Fourth Proportional to 12,446.73, 17,176.35 and 7,142.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,446.73 : 17,176.35 = 7,142.39 : x
2. Step 2: Convert to fraction form
   12,446.73/17,176.35 = 7,142.39/x
3. Step 3: Cross multiply
   12,446.73x = 17,176.35 × 7,142.39
4. Step 4: Simplify right side
   12,446.73x = 122,680,104.59
5. Step 5: Solve for x
   x = 122,680,104.59/12,446.73
6. Step 6: Final answer
   x = 9,856.41