Finding the Third Proportional to 621,270 and 1,358,856

Step by Step Solution

1. Step 1: Write the proportion equation
   621,270 : 1,358,856 = 1,358,856 : x
2. Step 2: Convert to fraction form
   621,270/1,358,856 = 1,358,856/x
3. Step 3: Cross multiply
   621,270x = 1,358,856 × 1,358,856
4. Step 4: Simplify right side
   621,270x = 1,846,489,628,736
5. Step 5: Solve for x
   x = 1,846,489,628,736/621,270
6. Step 6: Final answer
   x = 2,972,121.02