Finding the Third Proportional to 860,105 and 1,290,486

Step by Step Solution

1. Step 1: Write the proportion equation
   860,105 : 1,290,486 = 1,290,486 : x
2. Step 2: Convert to fraction form
   860,105/1,290,486 = 1,290,486/x
3. Step 3: Cross multiply
   860,105x = 1,290,486 × 1,290,486
4. Step 4: Simplify right side
   860,105x = 1,665,354,116,196
5. Step 5: Solve for x
   x = 1,665,354,116,196/860,105
6. Step 6: Final answer
   x = 1,936,221.88