Finding the Third Proportional to 7,940.81 and 11,872.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,940.81 : 11,872.69 = 11,872.69 : x
2. Step 2: Convert to fraction form
   7,940.81/11,872.69 = 11,872.69/x
3. Step 3: Cross multiply
   7,940.81x = 11,872.69 × 11,872.69
4. Step 4: Simplify right side
   7,940.81x = 140,960,708.47
5. Step 5: Solve for x
   x = 140,960,708.47/7,940.81
6. Step 6: Final answer
   x = 17,751.42