Finding the Third Proportional to 870,843 and 1,280,658

Step by Step Solution

1. Step 1: Write the proportion equation
   870,843 : 1,280,658 = 1,280,658 : x
2. Step 2: Convert to fraction form
   870,843/1,280,658 = 1,280,658/x
3. Step 3: Cross multiply
   870,843x = 1,280,658 × 1,280,658
4. Step 4: Simplify right side
   870,843x = 1,640,084,912,964
5. Step 5: Solve for x
   x = 1,640,084,912,964/870,843
6. Step 6: Final answer
   x = 1,883,330.19