Finding the Third Proportional to 300,834 and 641,700

Step by Step Solution

1. Step 1: Write the proportion equation
   300,834 : 641,700 = 641,700 : x
2. Step 2: Convert to fraction form
   300,834/641,700 = 641,700/x
3. Step 3: Cross multiply
   300,834x = 641,700 × 641,700
4. Step 4: Simplify right side
   300,834x = 411,778,890,000
5. Step 5: Solve for x
   x = 411,778,890,000/300,834
6. Step 6: Final answer
   x = 1,368,791.06