Finding the Third Proportional to 143,628 and 308,580

Step by Step Solution

1. Step 1: Write the proportion equation
   143,628 : 308,580 = 308,580 : x
2. Step 2: Convert to fraction form
   143,628/308,580 = 308,580/x
3. Step 3: Cross multiply
   143,628x = 308,580 × 308,580
4. Step 4: Simplify right side
   143,628x = 95,221,616,400
5. Step 5: Solve for x
   x = 95,221,616,400/143,628
6. Step 6: Final answer
   x = 662,973.91