Finding the Fourth Proportional to 9,148.72, 12,625.16 and 5,171.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,148.72 : 12,625.16 = 5,171.12 : x
2. Step 2: Convert to fraction form
   9,148.72/12,625.16 = 5,171.12/x
3. Step 3: Cross multiply
   9,148.72x = 12,625.16 × 5,171.12
4. Step 4: Simplify right side
   9,148.72x = 65,286,217.38
5. Step 5: Solve for x
   x = 65,286,217.38/9,148.72
6. Step 6: Final answer
   x = 7,136.10