Finding the Third Proportional to 3,128,999 and 6,497,804

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128,999 : 6,497,804 = 6,497,804 : x
2. Step 2: Convert to fraction form
   3,128,999/6,497,804 = 6,497,804/x
3. Step 3: Cross multiply
   3,128,999x = 6,497,804 × 6,497,804
4. Step 4: Simplify right side
   3,128,999x = 42,221,456,822,416
5. Step 5: Solve for x
   x = 42,221,456,822,416/3,128,999
6. Step 6: Final answer
   x = 13,493,598.69