Finding the Third Proportional to 131,469 and 287,253

Step by Step Solution

1. Step 1: Write the proportion equation
   131,469 : 287,253 = 287,253 : x
2. Step 2: Convert to fraction form
   131,469/287,253 = 287,253/x
3. Step 3: Cross multiply
   131,469x = 287,253 × 287,253
4. Step 4: Simplify right side
   131,469x = 82,514,286,009
5. Step 5: Solve for x
   x = 82,514,286,009/131,469
6. Step 6: Final answer
   x = 627,633.02