Finding the Fourth Proportional to 12,072.66, 18,109.94 and 4,676.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,072.66 : 18,109.94 = 4,676.55 : x
2. Step 2: Convert to fraction form
   12,072.66/18,109.94 = 4,676.55/x
3. Step 3: Cross multiply
   12,072.66x = 18,109.94 × 4,676.55
4. Step 4: Simplify right side
   12,072.66x = 84,692,016.52
5. Step 5: Solve for x
   x = 84,692,016.52/12,072.66
6. Step 6: Final answer
   x = 7,015.19