Finding the Fourth Proportional to 12,105.68, 18,158.56 and 3,340.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,105.68 : 18,158.56 = 3,340.40 : x
2. Step 2: Convert to fraction form
   12,105.68/18,158.56 = 3,340.40/x
3. Step 3: Cross multiply
   12,105.68x = 18,158.56 × 3,340.40
4. Step 4: Simplify right side
   12,105.68x = 60,656,853.82
5. Step 5: Solve for x
   x = 60,656,853.82/12,105.68
6. Step 6: Final answer
   x = 5,010.61