Finding the Fourth Proportional to 9,147.18, 12,623.36 and 5,168.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,147.18 : 12,623.36 = 5,168.21 : x
2. Step 2: Convert to fraction form
   9,147.18/12,623.36 = 5,168.21/x
3. Step 3: Cross multiply
   9,147.18x = 12,623.36 × 5,168.21
4. Step 4: Simplify right side
   9,147.18x = 65,240,086.43
5. Step 5: Solve for x
   x = 65,240,086.43/9,147.18
6. Step 6: Final answer
   x = 7,132.26