Finding the Third Proportional to 870,880 and 1,280,696

Step by Step Solution

1. Step 1: Write the proportion equation
   870,880 : 1,280,696 = 1,280,696 : x
2. Step 2: Convert to fraction form
   870,880/1,280,696 = 1,280,696/x
3. Step 3: Cross multiply
   870,880x = 1,280,696 × 1,280,696
4. Step 4: Simplify right side
   870,880x = 1,640,182,244,416
5. Step 5: Solve for x
   x = 1,640,182,244,416/870,880
6. Step 6: Final answer
   x = 1,883,361.94