Finding the Third Proportional to 131,487 and 287,851

Step by Step Solution

1. Step 1: Write the proportion equation
   131,487 : 287,851 = 287,851 : x
2. Step 2: Convert to fraction form
   131,487/287,851 = 287,851/x
3. Step 3: Cross multiply
   131,487x = 287,851 × 287,851
4. Step 4: Simplify right side
   131,487x = 82,858,198,201
5. Step 5: Solve for x
   x = 82,858,198,201/131,487
6. Step 6: Final answer
   x = 630,162.66