Finding the Third Proportional to 434,727 and 639,496.69

Step by Step Solution

1. Step 1: Write the proportion equation
   434,727 : 639,496.69 = 639,496.69 : x
2. Step 2: Convert to fraction form
   434,727/639,496.69 = 639,496.69/x
3. Step 3: Cross multiply
   434,727x = 639,496.69 × 639,496.69
4. Step 4: Simplify right side
   434,727x = 408,956,013,323.47
5. Step 5: Solve for x
   x = 408,956,013,323.47/434,727
6. Step 6: Final answer
   x = 940,719.15