Finding the Fourth Proportional to 12,676.79, 17,483.69 and 9,687.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,676.79 : 17,483.69 = 9,687.89 : x
2. Step 2: Convert to fraction form
   12,676.79/17,483.69 = 9,687.89/x
3. Step 3: Cross multiply
   12,676.79x = 17,483.69 × 9,687.89
4. Step 4: Simplify right side
   12,676.79x = 169,380,002.32
5. Step 5: Solve for x
   x = 169,380,002.32/12,676.79
6. Step 6: Final answer
   x = 13,361.43