Finding the Third Proportional to 280,434 and 608,435.50

Step by Step Solution

1. Step 1: Write the proportion equation
   280,434 : 608,435.50 = 608,435.50 : x
2. Step 2: Convert to fraction form
   280,434/608,435.50 = 608,435.50/x
3. Step 3: Cross multiply
   280,434x = 608,435.50 × 608,435.50
4. Step 4: Simplify right side
   280,434x = 370,193,757,660.25
5. Step 5: Solve for x
   x = 370,193,757,660.25/280,434
6. Step 6: Final answer
   x = 1,320,074.45