Finding the Third Proportional to 457,289 and 679,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   457,289 : 679,300.50 = 679,300.50 : x
2. Step 2: Convert to fraction form
   457,289/679,300.50 = 679,300.50/x
3. Step 3: Cross multiply
   457,289x = 679,300.50 × 679,300.50
4. Step 4: Simplify right side
   457,289x = 461,449,169,300.25
5. Step 5: Solve for x
   x = 461,449,169,300.25/457,289
6. Step 6: Final answer
   x = 1,009,097.46