Finding the Third Proportional to 65,215 and 142,930

Step by Step Solution

1. Step 1: Write the proportion equation
   65,215 : 142,930 = 142,930 : x
2. Step 2: Convert to fraction form
   65,215/142,930 = 142,930/x
3. Step 3: Cross multiply
   65,215x = 142,930 × 142,930
4. Step 4: Simplify right side
   65,215x = 20,428,984,900
5. Step 5: Solve for x
   x = 20,428,984,900/65,215
6. Step 6: Final answer
   x = 313,255.92