Finding the Third Proportional to 65,969.25 and 128,656.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,969.25 : 128,656.50 = 128,656.50 : x
2. Step 2: Convert to fraction form
   65,969.25/128,656.50 = 128,656.50/x
3. Step 3: Cross multiply
   65,969.25x = 128,656.50 × 128,656.50
4. Step 4: Simplify right side
   65,969.25x = 16,552,494,992.25
5. Step 5: Solve for x
   x = 16,552,494,992.25/65,969.25
6. Step 6: Final answer
   x = 250,912.28