Finding the Fourth Proportional to 8,663.10, 12,997.71 and 2,819.73

Step by Step Solution

1. Step 1: Write the proportion equation
   8,663.10 : 12,997.71 = 2,819.73 : x
2. Step 2: Convert to fraction form
   8,663.10/12,997.71 = 2,819.73/x
3. Step 3: Cross multiply
   8,663.10x = 12,997.71 × 2,819.73
4. Step 4: Simplify right side
   8,663.10x = 36,650,032.82
5. Step 5: Solve for x
   x = 36,650,032.82/8,663.10
6. Step 6: Final answer
   x = 4,230.59