Finding the Fourth Proportional to 9,168.87, 12,650.94 and 5,189.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,168.87 : 12,650.94 = 5,189.13 : x
2. Step 2: Convert to fraction form
   9,168.87/12,650.94 = 5,189.13/x
3. Step 3: Cross multiply
   9,168.87x = 12,650.94 × 5,189.13
4. Step 4: Simplify right side
   9,168.87x = 65,647,372.28
5. Step 5: Solve for x
   x = 65,647,372.28/9,168.87
6. Step 6: Final answer
   x = 7,159.81