Finding the Fourth Proportional to 13,064.37, 18,028.56 and 7,687.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,064.37 : 18,028.56 = 7,687.38 : x
2. Step 2: Convert to fraction form
   13,064.37/18,028.56 = 7,687.38/x
3. Step 3: Cross multiply
   13,064.37x = 18,028.56 × 7,687.38
4. Step 4: Simplify right side
   13,064.37x = 138,592,391.57
5. Step 5: Solve for x
   x = 138,592,391.57/13,064.37
6. Step 6: Final answer
   x = 10,608.43