Finding the Third Proportional to 5,399.16 and 12,711.94

Step by Step Solution

1. Step 1: Write the proportion equation
   5,399.16 : 12,711.94 = 12,711.94 : x
2. Step 2: Convert to fraction form
   5,399.16/12,711.94 = 12,711.94/x
3. Step 3: Cross multiply
   5,399.16x = 12,711.94 × 12,711.94
4. Step 4: Simplify right side
   5,399.16x = 161,593,355.00
5. Step 5: Solve for x
   x = 161,593,355.00/5,399.16
6. Step 6: Final answer
   x = 29,929.37