Finding the Third Proportional to 64,648 and 140,930

Step by Step Solution

1. Step 1: Write the proportion equation
   64,648 : 140,930 = 140,930 : x
2. Step 2: Convert to fraction form
   64,648/140,930 = 140,930/x
3. Step 3: Cross multiply
   64,648x = 140,930 × 140,930
4. Step 4: Simplify right side
   64,648x = 19,861,264,900
5. Step 5: Solve for x
   x = 19,861,264,900/64,648
6. Step 6: Final answer
   x = 307,221.64