Finding the Fourth Proportional to 9,168.38, 12,651.60 and 5,188.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,168.38 : 12,651.60 = 5,188.58 : x
2. Step 2: Convert to fraction form
   9,168.38/12,651.60 = 5,188.58/x
3. Step 3: Cross multiply
   9,168.38x = 12,651.60 × 5,188.58
4. Step 4: Simplify right side
   9,168.38x = 65,643,838.73
5. Step 5: Solve for x
   x = 65,643,838.73/9,168.38
6. Step 6: Final answer
   x = 7,159.81