Finding the Third Proportional to 144,380 and 314,968

Step by Step Solution

1. Step 1: Write the proportion equation
   144,380 : 314,968 = 314,968 : x
2. Step 2: Convert to fraction form
   144,380/314,968 = 314,968/x
3. Step 3: Cross multiply
   144,380x = 314,968 × 314,968
4. Step 4: Simplify right side
   144,380x = 99,204,841,024
5. Step 5: Solve for x
   x = 99,204,841,024/144,380
6. Step 6: Final answer
   x = 687,109.30