Finding the Third Proportional to 143,202 and 309,966

Step by Step Solution

1. Step 1: Write the proportion equation
   143,202 : 309,966 = 309,966 : x
2. Step 2: Convert to fraction form
   143,202/309,966 = 309,966/x
3. Step 3: Cross multiply
   143,202x = 309,966 × 309,966
4. Step 4: Simplify right side
   143,202x = 96,078,921,156
5. Step 5: Solve for x
   x = 96,078,921,156/143,202
6. Step 6: Final answer
   x = 670,932.82