Finding the Third Proportional to 434,742 and 665,080.50

Step by Step Solution

1. Step 1: Write the proportion equation
   434,742 : 665,080.50 = 665,080.50 : x
2. Step 2: Convert to fraction form
   434,742/665,080.50 = 665,080.50/x
3. Step 3: Cross multiply
   434,742x = 665,080.50 × 665,080.50
4. Step 4: Simplify right side
   434,742x = 442,332,071,480.25
5. Step 5: Solve for x
   x = 442,332,071,480.25/434,742
6. Step 6: Final answer
   x = 1,017,458.80