Finding the Third Proportional to 646,284 and 1,380,540

Step by Step Solution

1. Step 1: Write the proportion equation
   646,284 : 1,380,540 = 1,380,540 : x
2. Step 2: Convert to fraction form
   646,284/1,380,540 = 1,380,540/x
3. Step 3: Cross multiply
   646,284x = 1,380,540 × 1,380,540
4. Step 4: Simplify right side
   646,284x = 1,905,890,691,600
5. Step 5: Solve for x
   x = 1,905,890,691,600/646,284
6. Step 6: Final answer
   x = 2,948,998.72