Finding the Third Proportional to 143,541.28 and 309,018.38

Step by Step Solution

1. Step 1: Write the proportion equation
   143,541.28 : 309,018.38 = 309,018.38 : x
2. Step 2: Convert to fraction form
   143,541.28/309,018.38 = 309,018.38/x
3. Step 3: Cross multiply
   143,541.28x = 309,018.38 × 309,018.38
4. Step 4: Simplify right side
   143,541.28x = 95,492,356,087.64
5. Step 5: Solve for x
   x = 95,492,356,087.64/143,541.28
6. Step 6: Final answer
   x = 665,260.58