Finding the Fourth Proportional to 12,818.73, 17,687.72 and 8,562.97

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818.73 : 17,687.72 = 8,562.97 : x
2. Step 2: Convert to fraction form
   12,818.73/17,687.72 = 8,562.97/x
3. Step 3: Cross multiply
   12,818.73x = 17,687.72 × 8,562.97
4. Step 4: Simplify right side
   12,818.73x = 151,459,459.25
5. Step 5: Solve for x
   x = 151,459,459.25/12,818.73
6. Step 6: Final answer
   x = 11,815.48