Finding the Third Proportional to 640,392 and 1,004,538

Step by Step Solution

1. Step 1: Write the proportion equation
   640,392 : 1,004,538 = 1,004,538 : x
2. Step 2: Convert to fraction form
   640,392/1,004,538 = 1,004,538/x
3. Step 3: Cross multiply
   640,392x = 1,004,538 × 1,004,538
4. Step 4: Simplify right side
   640,392x = 1,009,096,593,444
5. Step 5: Solve for x
   x = 1,009,096,593,444/640,392
6. Step 6: Final answer
   x = 1,575,748.28