Finding the Fourth Proportional to 12,165.09, 18,246.37 and 3,280.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,165.09 : 18,246.37 = 3,280.05 : x
2. Step 2: Convert to fraction form
   12,165.09/18,246.37 = 3,280.05/x
3. Step 3: Cross multiply
   12,165.09x = 18,246.37 × 3,280.05
4. Step 4: Simplify right side
   12,165.09x = 59,849,005.92
5. Step 5: Solve for x
   x = 59,849,005.92/12,165.09
6. Step 6: Final answer
   x = 4,919.73