Finding the Fourth Proportional to 12,479.83, 18,662.89 and 9,319.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,479.83 : 18,662.89 = 9,319.49 : x
2. Step 2: Convert to fraction form
   12,479.83/18,662.89 = 9,319.49/x
3. Step 3: Cross multiply
   12,479.83x = 18,662.89 × 9,319.49
4. Step 4: Simplify right side
   12,479.83x = 173,928,500.11
5. Step 5: Solve for x
   x = 173,928,500.11/12,479.83
6. Step 6: Final answer
   x = 13,936.77