Finding the Third Proportional to 308,288.25 and 675,490.50

Step by Step Solution

1. Step 1: Write the proportion equation
   308,288.25 : 675,490.50 = 675,490.50 : x
2. Step 2: Convert to fraction form
   308,288.25/675,490.50 = 675,490.50/x
3. Step 3: Cross multiply
   308,288.25x = 675,490.50 × 675,490.50
4. Step 4: Simplify right side
   308,288.25x = 456,287,415,590.25
5. Step 5: Solve for x
   x = 456,287,415,590.25/308,288.25
6. Step 6: Final answer
   x = 1,480,067.49