Finding the Third Proportional to 131,208 and 287,634

Step by Step Solution

1. Step 1: Write the proportion equation
   131,208 : 287,634 = 287,634 : x
2. Step 2: Convert to fraction form
   131,208/287,634 = 287,634/x
3. Step 3: Cross multiply
   131,208x = 287,634 × 287,634
4. Step 4: Simplify right side
   131,208x = 82,733,317,956
5. Step 5: Solve for x
   x = 82,733,317,956/131,208
6. Step 6: Final answer
   x = 630,550.87