Finding the Third Proportional to 78,716.81 and 105,834.09

Step by Step Solution

1. Step 1: Write the proportion equation
   78,716.81 : 105,834.09 = 105,834.09 : x
2. Step 2: Convert to fraction form
   78,716.81/105,834.09 = 105,834.09/x
3. Step 3: Cross multiply
   78,716.81x = 105,834.09 × 105,834.09
4. Step 4: Simplify right side
   78,716.81x = 11,200,855,399.88
5. Step 5: Solve for x
   x = 11,200,855,399.88/78,716.81
6. Step 6: Final answer
   x = 142,293.05