Finding the Third Proportional to 483,840 and 768,664.69

Step by Step Solution

1. Step 1: Write the proportion equation
   483,840 : 768,664.69 = 768,664.69 : x
2. Step 2: Convert to fraction form
   483,840/768,664.69 = 768,664.69/x
3. Step 3: Cross multiply
   483,840x = 768,664.69 × 768,664.69
4. Step 4: Simplify right side
   483,840x = 590,845,401,809.47
5. Step 5: Solve for x
   x = 590,845,401,809.47/483,840
6. Step 6: Final answer
   x = 1,221,158.65