Finding the Third Proportional to 287,447.25 and 604,689

Step by Step Solution

1. Step 1: Write the proportion equation
   287,447.25 : 604,689 = 604,689 : x
2. Step 2: Convert to fraction form
   287,447.25/604,689 = 604,689/x
3. Step 3: Cross multiply
   287,447.25x = 604,689 × 604,689
4. Step 4: Simplify right side
   287,447.25x = 365,648,786,721
5. Step 5: Solve for x
   x = 365,648,786,721/287,447.25
6. Step 6: Final answer
   x = 1,272,055.26