Finding the Third Proportional to 131,451 and 287,223

Step by Step Solution

1. Step 1: Write the proportion equation
   131,451 : 287,223 = 287,223 : x
2. Step 2: Convert to fraction form
   131,451/287,223 = 287,223/x
3. Step 3: Cross multiply
   131,451x = 287,223 × 287,223
4. Step 4: Simplify right side
   131,451x = 82,497,051,729
5. Step 5: Solve for x
   x = 82,497,051,729/131,451
6. Step 6: Final answer
   x = 627,587.86