Finding the Fourth Proportional to 9,150.53, 12,627.98 and 5,171.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,150.53 : 12,627.98 = 5,171.55 : x
2. Step 2: Convert to fraction form
   9,150.53/12,627.98 = 5,171.55/x
3. Step 3: Cross multiply
   9,150.53x = 12,627.98 × 5,171.55
4. Step 4: Simplify right side
   9,150.53x = 65,306,229.97
5. Step 5: Solve for x
   x = 65,306,229.97/9,150.53
6. Step 6: Final answer
   x = 7,136.88