Finding the Third Proportional to 623,871 and 931,648

Step by Step Solution

1. Step 1: Write the proportion equation
   623,871 : 931,648 = 931,648 : x
2. Step 2: Convert to fraction form
   623,871/931,648 = 931,648/x
3. Step 3: Cross multiply
   623,871x = 931,648 × 931,648
4. Step 4: Simplify right side
   623,871x = 867,967,995,904
5. Step 5: Solve for x
   x = 867,967,995,904/623,871
6. Step 6: Final answer
   x = 1,391,261.97