Finding the Fourth Proportional to 12,469.28, 18,703.89 and 5,072.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,469.28 : 18,703.89 = 5,072.09 : x
2. Step 2: Convert to fraction form
   12,469.28/18,703.89 = 5,072.09/x
3. Step 3: Cross multiply
   12,469.28x = 18,703.89 × 5,072.09
4. Step 4: Simplify right side
   12,469.28x = 94,867,719.91
5. Step 5: Solve for x
   x = 94,867,719.91/12,469.28
6. Step 6: Final answer
   x = 7,608.12