Finding the Third Proportional to 65,974.50 and 128,648.25

Step by Step Solution

1. Step 1: Write the proportion equation
   65,974.50 : 128,648.25 = 128,648.25 : x
2. Step 2: Convert to fraction form
   65,974.50/128,648.25 = 128,648.25/x
3. Step 3: Cross multiply
   65,974.50x = 128,648.25 × 128,648.25
4. Step 4: Simplify right side
   65,974.50x = 16,550,372,228.06
5. Step 5: Solve for x
   x = 16,550,372,228.06/65,974.50
6. Step 6: Final answer
   x = 250,860.14