Finding the Fourth Proportional to 12,676.72, 17,499.54 and 8,435.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,676.72 : 17,499.54 = 8,435.30 : x
2. Step 2: Convert to fraction form
   12,676.72/17,499.54 = 8,435.30/x
3. Step 3: Cross multiply
   12,676.72x = 17,499.54 × 8,435.30
4. Step 4: Simplify right side
   12,676.72x = 147,613,869.76
5. Step 5: Solve for x
   x = 147,613,869.76/12,676.72
6. Step 6: Final answer
   x = 11,644.48