Finding the Third Proportional to 213,759 and 300,606.75

Step by Step Solution

1. Step 1: Write the proportion equation
   213,759 : 300,606.75 = 300,606.75 : x
2. Step 2: Convert to fraction form
   213,759/300,606.75 = 300,606.75/x
3. Step 3: Cross multiply
   213,759x = 300,606.75 × 300,606.75
4. Step 4: Simplify right side
   213,759x = 90,364,418,145.56
5. Step 5: Solve for x
   x = 90,364,418,145.56/213,759
6. Step 6: Final answer
   x = 422,739.71