Finding the Third Proportional to 78,469 and 100,751.25

Step by Step Solution

1. Step 1: Write the proportion equation
   78,469 : 100,751.25 = 100,751.25 : x
2. Step 2: Convert to fraction form
   78,469/100,751.25 = 100,751.25/x
3. Step 3: Cross multiply
   78,469x = 100,751.25 × 100,751.25
4. Step 4: Simplify right side
   78,469x = 10,150,814,376.56
5. Step 5: Solve for x
   x = 10,150,814,376.56/78,469
6. Step 6: Final answer
   x = 129,360.82