Finding the Fourth Proportional to 9,147.45, 12,623.46 and 5,168.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,147.45 : 12,623.46 = 5,168.57 : x
2. Step 2: Convert to fraction form
   9,147.45/12,623.46 = 5,168.57/x
3. Step 3: Cross multiply
   9,147.45x = 12,623.46 × 5,168.57
4. Step 4: Simplify right side
   9,147.45x = 65,245,154.15
5. Step 5: Solve for x
   x = 65,245,154.15/9,147.45
6. Step 6: Final answer
   x = 7,132.60