Finding the Fourth Proportional to 9,147.31, 12,622.66 and 5,168.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,147.31 : 12,622.66 = 5,168.18 : x
2. Step 2: Convert to fraction form
   9,147.31/12,622.66 = 5,168.18/x
3. Step 3: Cross multiply
   9,147.31x = 12,622.66 × 5,168.18
4. Step 4: Simplify right side
   9,147.31x = 65,236,178.96
5. Step 5: Solve for x
   x = 65,236,178.96/9,147.31
6. Step 6: Final answer
   x = 7,131.73