Finding the Third Proportional to 666,412 and 1,058,658

Step by Step Solution

1. Step 1: Write the proportion equation
   666,412 : 1,058,658 = 1,058,658 : x
2. Step 2: Convert to fraction form
   666,412/1,058,658 = 1,058,658/x
3. Step 3: Cross multiply
   666,412x = 1,058,658 × 1,058,658
4. Step 4: Simplify right side
   666,412x = 1,120,756,760,964
5. Step 5: Solve for x
   x = 1,120,756,760,964/666,412
6. Step 6: Final answer
   x = 1,681,777.58