Finding the Third Proportional to 860,058 and 1,290,411

Step by Step Solution

1. Step 1: Write the proportion equation
   860,058 : 1,290,411 = 1,290,411 : x
2. Step 2: Convert to fraction form
   860,058/1,290,411 = 1,290,411/x
3. Step 3: Cross multiply
   860,058x = 1,290,411 × 1,290,411
4. Step 4: Simplify right side
   860,058x = 1,665,160,548,921
5. Step 5: Solve for x
   x = 1,665,160,548,921/860,058
6. Step 6: Final answer
   x = 1,936,102.62