Finding the Third Proportional to 131,796 and 287,451

Step by Step Solution

1. Step 1: Write the proportion equation
   131,796 : 287,451 = 287,451 : x
2. Step 2: Convert to fraction form
   131,796/287,451 = 287,451/x
3. Step 3: Cross multiply
   131,796x = 287,451 × 287,451
4. Step 4: Simplify right side
   131,796x = 82,628,077,401
5. Step 5: Solve for x
   x = 82,628,077,401/131,796
6. Step 6: Final answer
   x = 626,939.19