Finding the Fourth Proportional to 12,167.62, 18,258.63 and 5,147.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,167.62 : 18,258.63 = 5,147.25 : x
2. Step 2: Convert to fraction form
   12,167.62/18,258.63 = 5,147.25/x
3. Step 3: Cross multiply
   12,167.62x = 18,258.63 × 5,147.25
4. Step 4: Simplify right side
   12,167.62x = 93,981,733.27
5. Step 5: Solve for x
   x = 93,981,733.27/12,167.62
6. Step 6: Final answer
   x = 7,723.92