Finding the Third Proportional to 664,398 and 1,417,380

Step by Step Solution

1. Step 1: Write the proportion equation
   664,398 : 1,417,380 = 1,417,380 : x
2. Step 2: Convert to fraction form
   664,398/1,417,380 = 1,417,380/x
3. Step 3: Cross multiply
   664,398x = 1,417,380 × 1,417,380
4. Step 4: Simplify right side
   664,398x = 2,008,966,064,400
5. Step 5: Solve for x
   x = 2,008,966,064,400/664,398
6. Step 6: Final answer
   x = 3,023,738.88