Finding the Third Proportional to 144,288 and 308,520

Step by Step Solution

1. Step 1: Write the proportion equation
   144,288 : 308,520 = 308,520 : x
2. Step 2: Convert to fraction form
   144,288/308,520 = 308,520/x
3. Step 3: Cross multiply
   144,288x = 308,520 × 308,520
4. Step 4: Simplify right side
   144,288x = 95,184,590,400
5. Step 5: Solve for x
   x = 95,184,590,400/144,288
6. Step 6: Final answer
   x = 659,684.73