Finding the Fourth Proportional to 12,998.05, 19,498.69 and 4,230.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,998.05 : 19,498.69 = 4,230.61 : x
2. Step 2: Convert to fraction form
   12,998.05/19,498.69 = 4,230.61/x
3. Step 3: Cross multiply
   12,998.05x = 19,498.69 × 4,230.61
4. Step 4: Simplify right side
   12,998.05x = 82,491,244.83
5. Step 5: Solve for x
   x = 82,491,244.83/12,998.05
6. Step 6: Final answer
   x = 6,346.43