Finding the Fourth Proportional to 13,306.38, 18,362.00 and 7,639.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,306.38 : 18,362.00 = 7,639.89 : x
2. Step 2: Convert to fraction form
   13,306.38/18,362.00 = 7,639.89/x
3. Step 3: Cross multiply
   13,306.38x = 18,362.00 × 7,639.89
4. Step 4: Simplify right side
   13,306.38x = 140,283,621.98
5. Step 5: Solve for x
   x = 140,283,621.98/13,306.38
6. Step 6: Final answer
   x = 10,542.58