Finding the Third Proportional to 621,208 and 1,358,728

Step by Step Solution

1. Step 1: Write the proportion equation
   621,208 : 1,358,728 = 1,358,728 : x
2. Step 2: Convert to fraction form
   621,208/1,358,728 = 1,358,728/x
3. Step 3: Cross multiply
   621,208x = 1,358,728 × 1,358,728
4. Step 4: Simplify right side
   621,208x = 1,846,141,777,984
5. Step 5: Solve for x
   x = 1,846,141,777,984/621,208
6. Step 6: Final answer
   x = 2,971,857.70