Finding the Fourth Proportional to 12,659.34, 18,989.31 and 3,894.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,659.34 : 18,989.31 = 3,894.33 : x
2. Step 2: Convert to fraction form
   12,659.34/18,989.31 = 3,894.33/x
3. Step 3: Cross multiply
   12,659.34x = 18,989.31 × 3,894.33
4. Step 4: Simplify right side
   12,659.34x = 73,950,639.61
5. Step 5: Solve for x
   x = 73,950,639.61/12,659.34
6. Step 6: Final answer
   x = 5,841.59