Finding the Third Proportional to 143,320.50 and 303,705

Step by Step Solution

1. Step 1: Write the proportion equation
   143,320.50 : 303,705 = 303,705 : x
2. Step 2: Convert to fraction form
   143,320.50/303,705 = 303,705/x
3. Step 3: Cross multiply
   143,320.50x = 303,705 × 303,705
4. Step 4: Simplify right side
   143,320.50x = 92,236,727,025
5. Step 5: Solve for x
   x = 92,236,727,025/143,320.50
6. Step 6: Final answer
   x = 643,569.67