Finding the Third Proportional to 287,442 and 604,651.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,442 : 604,651.50 = 604,651.50 : x
2. Step 2: Convert to fraction form
   287,442/604,651.50 = 604,651.50/x
3. Step 3: Cross multiply
   287,442x = 604,651.50 × 604,651.50
4. Step 4: Simplify right side
   287,442x = 365,603,436,452.25
5. Step 5: Solve for x
   x = 365,603,436,452.25/287,442
6. Step 6: Final answer
   x = 1,271,920.72