Finding the Third Proportional to 131,476 and 287,828

Step by Step Solution

1. Step 1: Write the proportion equation
   131,476 : 287,828 = 287,828 : x
2. Step 2: Convert to fraction form
   131,476/287,828 = 287,828/x
3. Step 3: Cross multiply
   131,476x = 287,828 × 287,828
4. Step 4: Simplify right side
   131,476x = 82,844,957,584
5. Step 5: Solve for x
   x = 82,844,957,584/131,476
6. Step 6: Final answer
   x = 630,114.68