Finding the Third Proportional to 641,787 and 997,780.50

Step by Step Solution

1. Step 1: Write the proportion equation
   641,787 : 997,780.50 = 997,780.50 : x
2. Step 2: Convert to fraction form
   641,787/997,780.50 = 997,780.50/x
3. Step 3: Cross multiply
   641,787x = 997,780.50 × 997,780.50
4. Step 4: Simplify right side
   641,787x = 995,565,926,180.25
5. Step 5: Solve for x
   x = 995,565,926,180.25/641,787
6. Step 6: Final answer
   x = 1,551,240.41