Finding the Fourth Proportional to 12,072.24, 18,108.72 and 4,676.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,072.24 : 18,108.72 = 4,676.40 : x
2. Step 2: Convert to fraction form
   12,072.24/18,108.72 = 4,676.40/x
3. Step 3: Cross multiply
   12,072.24x = 18,108.72 × 4,676.40
4. Step 4: Simplify right side
   12,072.24x = 84,683,618.21
5. Step 5: Solve for x
   x = 84,683,618.21/12,072.24
6. Step 6: Final answer
   x = 7,014.74