Finding the Third Proportional to 191,455 and 422,030

Step by Step Solution

1. Step 1: Write the proportion equation
   191,455 : 422,030 = 422,030 : x
2. Step 2: Convert to fraction form
   191,455/422,030 = 422,030/x
3. Step 3: Cross multiply
   191,455x = 422,030 × 422,030
4. Step 4: Simplify right side
   191,455x = 178,109,320,900
5. Step 5: Solve for x
   x = 178,109,320,900/191,455
6. Step 6: Final answer
   x = 930,293.39