Finding the Third Proportional to 641,412 and 1,385,520

Step by Step Solution

1. Step 1: Write the proportion equation
   641,412 : 1,385,520 = 1,385,520 : x
2. Step 2: Convert to fraction form
   641,412/1,385,520 = 1,385,520/x
3. Step 3: Cross multiply
   641,412x = 1,385,520 × 1,385,520
4. Step 4: Simplify right side
   641,412x = 1,919,665,670,400
5. Step 5: Solve for x
   x = 1,919,665,670,400/641,412
6. Step 6: Final answer
   x = 2,992,874.58