Finding the Third Proportional to 65,145.50 and 142,759

Step by Step Solution

1. Step 1: Write the proportion equation
   65,145.50 : 142,759 = 142,759 : x
2. Step 2: Convert to fraction form
   65,145.50/142,759 = 142,759/x
3. Step 3: Cross multiply
   65,145.50x = 142,759 × 142,759
4. Step 4: Simplify right side
   65,145.50x = 20,380,132,081
5. Step 5: Solve for x
   x = 20,380,132,081/65,145.50
6. Step 6: Final answer
   x = 312,840.21