Finding the Third Proportional to 143,653.50 and 308,630.25

Step by Step Solution

1. Step 1: Write the proportion equation
   143,653.50 : 308,630.25 = 308,630.25 : x
2. Step 2: Convert to fraction form
   143,653.50/308,630.25 = 308,630.25/x
3. Step 3: Cross multiply
   143,653.50x = 308,630.25 × 308,630.25
4. Step 4: Simplify right side
   143,653.50x = 95,252,631,215.06
5. Step 5: Solve for x
   x = 95,252,631,215.06/143,653.50
6. Step 6: Final answer
   x = 663,072.12