Finding the Fourth Proportional to 12,172.91, 18,244.71 and 7,958.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,172.91 : 18,244.71 = 7,958.14 : x
2. Step 2: Convert to fraction form
   12,172.91/18,244.71 = 7,958.14/x
3. Step 3: Cross multiply
   12,172.91x = 18,244.71 × 7,958.14
4. Step 4: Simplify right side
   12,172.91x = 145,193,910.83
5. Step 5: Solve for x
   x = 145,193,910.83/12,172.91
6. Step 6: Final answer
   x = 11,927.63