Finding the Third Proportional to 215,426 and 335,030

Step by Step Solution

1. Step 1: Write the proportion equation
   215,426 : 335,030 = 335,030 : x
2. Step 2: Convert to fraction form
   215,426/335,030 = 335,030/x
3. Step 3: Cross multiply
   215,426x = 335,030 × 335,030
4. Step 4: Simplify right side
   215,426x = 112,245,100,900
5. Step 5: Solve for x
   x = 112,245,100,900/215,426
6. Step 6: Final answer
   x = 521,037.85