Finding the Fourth Proportional to 12,997.05, 19,498.20 and 4,229.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,997.05 : 19,498.20 = 4,229.61 : x
2. Step 2: Convert to fraction form
   12,997.05/19,498.20 = 4,229.61/x
3. Step 3: Cross multiply
   12,997.05x = 19,498.20 × 4,229.61
4. Step 4: Simplify right side
   12,997.05x = 82,469,781.70
5. Step 5: Solve for x
   x = 82,469,781.70/12,997.05
6. Step 6: Final answer
   x = 6,345.27