Finding the Third Proportional to 665,440 and 1,442,980

Step by Step Solution

1. Step 1: Write the proportion equation
   665,440 : 1,442,980 = 1,442,980 : x
2. Step 2: Convert to fraction form
   665,440/1,442,980 = 1,442,980/x
3. Step 3: Cross multiply
   665,440x = 1,442,980 × 1,442,980
4. Step 4: Simplify right side
   665,440x = 2,082,191,280,400
5. Step 5: Solve for x
   x = 2,082,191,280,400/665,440
6. Step 6: Final answer
   x = 3,129,044.36