Finding the Third Proportional to 141,361 and 309,458

Step by Step Solution

1. Step 1: Write the proportion equation
   141,361 : 309,458 = 309,458 : x
2. Step 2: Convert to fraction form
   141,361/309,458 = 309,458/x
3. Step 3: Cross multiply
   141,361x = 309,458 × 309,458
4. Step 4: Simplify right side
   141,361x = 95,764,253,764
5. Step 5: Solve for x
   x = 95,764,253,764/141,361
6. Step 6: Final answer
   x = 677,444.65