Finding the Fourth Proportional to 12,638.50, 17,441.13 and 7,049.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,638.50 : 17,441.13 = 7,049.50 : x
2. Step 2: Convert to fraction form
   12,638.50/17,441.13 = 7,049.50/x
3. Step 3: Cross multiply
   12,638.50x = 17,441.13 × 7,049.50
4. Step 4: Simplify right side
   12,638.50x = 122,951,245.94
5. Step 5: Solve for x
   x = 122,951,245.94/12,638.50
6. Step 6: Final answer
   x = 9,728.31