Finding the Fourth Proportional to 9,151.38, 12,628.73 and 5,172.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,151.38 : 12,628.73 = 5,172.41 : x
2. Step 2: Convert to fraction form
   9,151.38/12,628.73 = 5,172.41/x
3. Step 3: Cross multiply
   9,151.38x = 12,628.73 × 5,172.41
4. Step 4: Simplify right side
   9,151.38x = 65,320,880.33
5. Step 5: Solve for x
   x = 65,320,880.33/9,151.38
6. Step 6: Final answer
   x = 7,137.82