Finding the Third Proportional to 490,398 and 659,017.50

Step by Step Solution

1. Step 1: Write the proportion equation
   490,398 : 659,017.50 = 659,017.50 : x
2. Step 2: Convert to fraction form
   490,398/659,017.50 = 659,017.50/x
3. Step 3: Cross multiply
   490,398x = 659,017.50 × 659,017.50
4. Step 4: Simplify right side
   490,398x = 434,304,065,306.25
5. Step 5: Solve for x
   x = 434,304,065,306.25/490,398
6. Step 6: Final answer
   x = 885,615.49