Finding the Third Proportional to 144,232 and 315,608

Step by Step Solution

1. Step 1: Write the proportion equation
   144,232 : 315,608 = 315,608 : x
2. Step 2: Convert to fraction form
   144,232/315,608 = 315,608/x
3. Step 3: Cross multiply
   144,232x = 315,608 × 315,608
4. Step 4: Simplify right side
   144,232x = 99,608,409,664
5. Step 5: Solve for x
   x = 99,608,409,664/144,232
6. Step 6: Final answer
   x = 690,612.41