Finding the Fourth Proportional to 14,429.46, 19,906.15 and 8,458.61

Step by Step Solution

1. Step 1: Write the proportion equation
   14,429.46 : 19,906.15 = 8,458.61 : x
2. Step 2: Convert to fraction form
   14,429.46/19,906.15 = 8,458.61/x
3. Step 3: Cross multiply
   14,429.46x = 19,906.15 × 8,458.61
4. Step 4: Simplify right side
   14,429.46x = 168,378,359.45
5. Step 5: Solve for x
   x = 168,378,359.45/14,429.46
6. Step 6: Final answer
   x = 11,669.07