Finding the Third Proportional to 287,212.50 and 613,521

Step by Step Solution

1. Step 1: Write the proportion equation
   287,212.50 : 613,521 = 613,521 : x
2. Step 2: Convert to fraction form
   287,212.50/613,521 = 613,521/x
3. Step 3: Cross multiply
   287,212.50x = 613,521 × 613,521
4. Step 4: Simplify right side
   287,212.50x = 376,408,017,441
5. Step 5: Solve for x
   x = 376,408,017,441/287,212.50
6. Step 6: Final answer
   x = 1,310,555.83