Finding the Fourth Proportional to 12,469.72, 18,706.56 and 4,679.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,469.72 : 18,706.56 = 4,679.12 : x
2. Step 2: Convert to fraction form
   12,469.72/18,706.56 = 4,679.12/x
3. Step 3: Cross multiply
   12,469.72x = 18,706.56 × 4,679.12
4. Step 4: Simplify right side
   12,469.72x = 87,530,239.03
5. Step 5: Solve for x
   x = 87,530,239.03/12,469.72
6. Step 6: Final answer
   x = 7,019.42