Finding the Third Proportional to 65,144.25 and 142,756.88

Step by Step Solution

1. Step 1: Write the proportion equation
   65,144.25 : 142,756.88 = 142,756.88 : x
2. Step 2: Convert to fraction form
   65,144.25/142,756.88 = 142,756.88/x
3. Step 3: Cross multiply
   65,144.25x = 142,756.88 × 142,756.88
4. Step 4: Simplify right side
   65,144.25x = 20,379,525,359.77
5. Step 5: Solve for x
   x = 20,379,525,359.77/65,144.25
6. Step 6: Final answer
   x = 312,836.90