Finding the Third Proportional to 641,584 and 1,298,716

Step by Step Solution

1. Step 1: Write the proportion equation
   641,584 : 1,298,716 = 1,298,716 : x
2. Step 2: Convert to fraction form
   641,584/1,298,716 = 1,298,716/x
3. Step 3: Cross multiply
   641,584x = 1,298,716 × 1,298,716
4. Step 4: Simplify right side
   641,584x = 1,686,663,248,656
5. Step 5: Solve for x
   x = 1,686,663,248,656/641,584
6. Step 6: Final answer
   x = 2,628,904.79