Finding the Third Proportional to 680,510 and 1,058,440

Step by Step Solution

1. Step 1: Write the proportion equation
   680,510 : 1,058,440 = 1,058,440 : x
2. Step 2: Convert to fraction form
   680,510/1,058,440 = 1,058,440/x
3. Step 3: Cross multiply
   680,510x = 1,058,440 × 1,058,440
4. Step 4: Simplify right side
   680,510x = 1,120,295,233,600
5. Step 5: Solve for x
   x = 1,120,295,233,600/680,510
6. Step 6: Final answer
   x = 1,646,258.30