Finding the Third Proportional to 131,492 and 287,536

Step by Step Solution

1. Step 1: Write the proportion equation
   131,492 : 287,536 = 287,536 : x
2. Step 2: Convert to fraction form
   131,492/287,536 = 287,536/x
3. Step 3: Cross multiply
   131,492x = 287,536 × 287,536
4. Step 4: Simplify right side
   131,492x = 82,676,951,296
5. Step 5: Solve for x
   x = 82,676,951,296/131,492
6. Step 6: Final answer
   x = 628,760.31