Finding the Third Proportional to 434,634 and 664,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   434,634 : 664,870.50 = 664,870.50 : x
2. Step 2: Convert to fraction form
   434,634/664,870.50 = 664,870.50/x
3. Step 3: Cross multiply
   434,634x = 664,870.50 × 664,870.50
4. Step 4: Simplify right side
   434,634x = 442,052,781,770.25
5. Step 5: Solve for x
   x = 442,052,781,770.25/434,634
6. Step 6: Final answer
   x = 1,017,069.03