Finding the Fourth Proportional to 12,822.72, 17,691.84 and 8,108.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,822.72 : 17,691.84 = 8,108.96 : x
2. Step 2: Convert to fraction form
   12,822.72/17,691.84 = 8,108.96/x
3. Step 3: Cross multiply
   12,822.72x = 17,691.84 × 8,108.96
4. Step 4: Simplify right side
   12,822.72x = 143,462,422.89
5. Step 5: Solve for x
   x = 143,462,422.89/12,822.72
6. Step 6: Final answer
   x = 11,188.14