Finding the Fourth Proportional to 12,394.88, 18,665.60 and 8,956.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,394.88 : 18,665.60 = 8,956.16 : x
2. Step 2: Convert to fraction form
   12,394.88/18,665.60 = 8,956.16/x
3. Step 3: Cross multiply
   12,394.88x = 18,665.60 × 8,956.16
4. Step 4: Simplify right side
   12,394.88x = 167,172,100.10
5. Step 5: Solve for x
   x = 167,172,100.10/12,394.88
6. Step 6: Final answer
   x = 13,487.19