Finding the Third Proportional to 641,779 and 997,768.50

Step by Step Solution

1. Step 1: Write the proportion equation
   641,779 : 997,768.50 = 997,768.50 : x
2. Step 2: Convert to fraction form
   641,779/997,768.50 = 997,768.50/x
3. Step 3: Cross multiply
   641,779x = 997,768.50 × 997,768.50
4. Step 4: Simplify right side
   641,779x = 995,541,979,592.25
5. Step 5: Solve for x
   x = 995,541,979,592.25/641,779
6. Step 6: Final answer
   x = 1,551,222.43