Finding the Third Proportional to 143,320.50 and 306,729

Step by Step Solution

1. Step 1: Write the proportion equation
   143,320.50 : 306,729 = 306,729 : x
2. Step 2: Convert to fraction form
   143,320.50/306,729 = 306,729/x
3. Step 3: Cross multiply
   143,320.50x = 306,729 × 306,729
4. Step 4: Simplify right side
   143,320.50x = 94,082,679,441
5. Step 5: Solve for x
   x = 94,082,679,441/143,320.50
6. Step 6: Final answer
   x = 656,449.56