Finding the Third Proportional to 143,573 and 309,082

Step by Step Solution

1. Step 1: Write the proportion equation
   143,573 : 309,082 = 309,082 : x
2. Step 2: Convert to fraction form
   143,573/309,082 = 309,082/x
3. Step 3: Cross multiply
   143,573x = 309,082 × 309,082
4. Step 4: Simplify right side
   143,573x = 95,531,682,724
5. Step 5: Solve for x
   x = 95,531,682,724/143,573
6. Step 6: Final answer
   x = 665,387.52