Finding the Third Proportional to 78,469 and 100,751

Step by Step Solution

1. Step 1: Write the proportion equation
   78,469 : 100,751 = 100,751 : x
2. Step 2: Convert to fraction form
   78,469/100,751 = 100,751/x
3. Step 3: Cross multiply
   78,469x = 100,751 × 100,751
4. Step 4: Simplify right side
   78,469x = 10,150,764,001
5. Step 5: Solve for x
   x = 10,150,764,001/78,469
6. Step 6: Final answer
   x = 129,360.18