Finding the Third Proportional to 657,820 and 1,438,664

Step by Step Solution

1. Step 1: Write the proportion equation
   657,820 : 1,438,664 = 1,438,664 : x
2. Step 2: Convert to fraction form
   657,820/1,438,664 = 1,438,664/x
3. Step 3: Cross multiply
   657,820x = 1,438,664 × 1,438,664
4. Step 4: Simplify right side
   657,820x = 2,069,754,104,896
5. Step 5: Solve for x
   x = 2,069,754,104,896/657,820
6. Step 6: Final answer
   x = 3,146,383.67