Finding the Fourth Proportional to 9,168.12, 12,649.91 and 5,188.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,168.12 : 12,649.91 = 5,188.37 : x
2. Step 2: Convert to fraction form
   9,168.12/12,649.91 = 5,188.37/x
3. Step 3: Cross multiply
   9,168.12x = 12,649.91 × 5,188.37
4. Step 4: Simplify right side
   9,168.12x = 65,632,324.36
5. Step 5: Solve for x
   x = 65,632,324.36/9,168.12
6. Step 6: Final answer
   x = 7,158.75