Finding the Third Proportional to 131,502 and 287,607

Step by Step Solution

1. Step 1: Write the proportion equation
   131,502 : 287,607 = 287,607 : x
2. Step 2: Convert to fraction form
   131,502/287,607 = 287,607/x
3. Step 3: Cross multiply
   131,502x = 287,607 × 287,607
4. Step 4: Simplify right side
   131,502x = 82,717,786,449
5. Step 5: Solve for x
   x = 82,717,786,449/131,502
6. Step 6: Final answer
   x = 629,023.03