Finding the Fourth Proportional to 7,173.42, 10,758.15 and 5,087.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,173.42 : 10,758.15 = 5,087.28 : x
2. Step 2: Convert to fraction form
   7,173.42/10,758.15 = 5,087.28/x
3. Step 3: Cross multiply
   7,173.42x = 10,758.15 × 5,087.28
4. Step 4: Simplify right side
   7,173.42x = 54,729,721.33
5. Step 5: Solve for x
   x = 54,729,721.33/7,173.42
6. Step 6: Final answer
   x = 7,629.52