Finding the Third Proportional to 7,959.38 and 12,121.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,959.38 : 12,121.31 = 12,121.31 : x
2. Step 2: Convert to fraction form
   7,959.38/12,121.31 = 12,121.31/x
3. Step 3: Cross multiply
   7,959.38x = 12,121.31 × 12,121.31
4. Step 4: Simplify right side
   7,959.38x = 146,926,216.72
5. Step 5: Solve for x
   x = 146,926,216.72/7,959.38
6. Step 6: Final answer
   x = 18,459.52