Finding the Third Proportional to 140,565 and 309,930

Step by Step Solution

1. Step 1: Write the proportion equation
   140,565 : 309,930 = 309,930 : x
2. Step 2: Convert to fraction form
   140,565/309,930 = 309,930/x
3. Step 3: Cross multiply
   140,565x = 309,930 × 309,930
4. Step 4: Simplify right side
   140,565x = 96,056,604,900
5. Step 5: Solve for x
   x = 96,056,604,900/140,565
6. Step 6: Final answer
   x = 683,360.76