Finding the Third Proportional to 439,969.50 and 788,449.50

Step by Step Solution

1. Step 1: Write the proportion equation
   439,969.50 : 788,449.50 = 788,449.50 : x
2. Step 2: Convert to fraction form
   439,969.50/788,449.50 = 788,449.50/x
3. Step 3: Cross multiply
   439,969.50x = 788,449.50 × 788,449.50
4. Step 4: Simplify right side
   439,969.50x = 621,652,614,050.25
5. Step 5: Solve for x
   x = 621,652,614,050.25/439,969.50
6. Step 6: Final answer
   x = 1,412,944.79