Finding the Fourth Proportional to 12,917.18, 17,821.12 and 8,443.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,917.18 : 17,821.12 = 8,443.52 : x
2. Step 2: Convert to fraction form
   12,917.18/17,821.12 = 8,443.52/x
3. Step 3: Cross multiply
   12,917.18x = 17,821.12 × 8,443.52
4. Step 4: Simplify right side
   12,917.18x = 150,472,983.14
5. Step 5: Solve for x
   x = 150,472,983.14/12,917.18
6. Step 6: Final answer
   x = 11,649.06