Finding the Fourth Proportional to 12,446.61, 17,176.18 and 7,142.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,446.61 : 17,176.18 = 7,142.25 : x
2. Step 2: Convert to fraction form
   12,446.61/17,176.18 = 7,142.25/x
3. Step 3: Cross multiply
   12,446.61x = 17,176.18 × 7,142.25
4. Step 4: Simplify right side
   12,446.61x = 122,676,571.61
5. Step 5: Solve for x
   x = 122,676,571.61/12,446.61
6. Step 6: Final answer
   x = 9,856.22