Finding the Third Proportional to 643,770 and 1,395,054

Step by Step Solution

1. Step 1: Write the proportion equation
   643,770 : 1,395,054 = 1,395,054 : x
2. Step 2: Convert to fraction form
   643,770/1,395,054 = 1,395,054/x
3. Step 3: Cross multiply
   643,770x = 1,395,054 × 1,395,054
4. Step 4: Simplify right side
   643,770x = 1,946,175,662,916
5. Step 5: Solve for x
   x = 1,946,175,662,916/643,770
6. Step 6: Final answer
   x = 3,023,091.57