Finding the Fourth Proportional to 12,081.67, 18,118.16 and 4,182.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,081.67 : 18,118.16 = 4,182.05 : x
2. Step 2: Convert to fraction form
   12,081.67/18,118.16 = 4,182.05/x
3. Step 3: Cross multiply
   12,081.67x = 18,118.16 × 4,182.05
4. Step 4: Simplify right side
   12,081.67x = 75,771,012.71
5. Step 5: Solve for x
   x = 75,771,012.71/12,081.67
6. Step 6: Final answer
   x = 6,271.57