Finding the Third Proportional to 483,840 and 768,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   483,840 : 768,661.50 = 768,661.50 : x
2. Step 2: Convert to fraction form
   483,840/768,661.50 = 768,661.50/x
3. Step 3: Cross multiply
   483,840x = 768,661.50 × 768,661.50
4. Step 4: Simplify right side
   483,840x = 590,840,501,582.25
5. Step 5: Solve for x
   x = 590,840,501,582.25/483,840
6. Step 6: Final answer
   x = 1,221,148.52