Finding the Fourth Proportional to 12,322.96, 18,456.67 and 8,641.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,322.96 : 18,456.67 = 8,641.61 : x
2. Step 2: Convert to fraction form
   12,322.96/18,456.67 = 8,641.61/x
3. Step 3: Cross multiply
   12,322.96x = 18,456.67 × 8,641.61
4. Step 4: Simplify right side
   12,322.96x = 159,495,344.04
5. Step 5: Solve for x
   x = 159,495,344.04/12,322.96
6. Step 6: Final answer
   x = 12,942.94