Finding the Third Proportional to 144,040 and 309,404

Step by Step Solution

1. Step 1: Write the proportion equation
   144,040 : 309,404 = 309,404 : x
2. Step 2: Convert to fraction form
   144,040/309,404 = 309,404/x
3. Step 3: Cross multiply
   144,040x = 309,404 × 309,404
4. Step 4: Simplify right side
   144,040x = 95,730,835,216
5. Step 5: Solve for x
   x = 95,730,835,216/144,040
6. Step 6: Final answer
   x = 664,612.85