Finding the Third Proportional to 287,691.75 and 605,718

Step by Step Solution

1. Step 1: Write the proportion equation
   287,691.75 : 605,718 = 605,718 : x
2. Step 2: Convert to fraction form
   287,691.75/605,718 = 605,718/x
3. Step 3: Cross multiply
   287,691.75x = 605,718 × 605,718
4. Step 4: Simplify right side
   287,691.75x = 366,894,295,524
5. Step 5: Solve for x
   x = 366,894,295,524/287,691.75
6. Step 6: Final answer
   x = 1,275,303.50