Finding the Third Proportional to 343,921.50 and 386,568

Step by Step Solution

1. Step 1: Write the proportion equation
   343,921.50 : 386,568 = 386,568 : x
2. Step 2: Convert to fraction form
   343,921.50/386,568 = 386,568/x
3. Step 3: Cross multiply
   343,921.50x = 386,568 × 386,568
4. Step 4: Simplify right side
   343,921.50x = 149,434,818,624
5. Step 5: Solve for x
   x = 149,434,818,624/343,921.50
6. Step 6: Final answer
   x = 434,502.70