Finding the Third Proportional to 440,004 and 660,978

Step by Step Solution

1. Step 1: Write the proportion equation
   440,004 : 660,978 = 660,978 : x
2. Step 2: Convert to fraction form
   440,004/660,978 = 660,978/x
3. Step 3: Cross multiply
   440,004x = 660,978 × 660,978
4. Step 4: Simplify right side
   440,004x = 436,891,916,484
5. Step 5: Solve for x
   x = 436,891,916,484/440,004
6. Step 6: Final answer
   x = 992,927.15