Finding the Fourth Proportional to 12,861.94, 17,755.54 and 9,676.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,861.94 : 17,755.54 = 9,676.45 : x
2. Step 2: Convert to fraction form
   12,861.94/17,755.54 = 9,676.45/x
3. Step 3: Cross multiply
   12,861.94x = 17,755.54 × 9,676.45
4. Step 4: Simplify right side
   12,861.94x = 171,810,493.16
5. Step 5: Solve for x
   x = 171,810,493.16/12,861.94
6. Step 6: Final answer
   x = 13,358.05