Finding the Third Proportional to 144,366 and 314,940

Step by Step Solution

1. Step 1: Write the proportion equation
   144,366 : 314,940 = 314,940 : x
2. Step 2: Convert to fraction form
   144,366/314,940 = 314,940/x
3. Step 3: Cross multiply
   144,366x = 314,940 × 314,940
4. Step 4: Simplify right side
   144,366x = 99,187,203,600
5. Step 5: Solve for x
   x = 99,187,203,600/144,366
6. Step 6: Final answer
   x = 687,053.76