Finding the Third Proportional to 131,205 and 287,628

Step by Step Solution

1. Step 1: Write the proportion equation
   131,205 : 287,628 = 287,628 : x
2. Step 2: Convert to fraction form
   131,205/287,628 = 287,628/x
3. Step 3: Cross multiply
   131,205x = 287,628 × 287,628
4. Step 4: Simplify right side
   131,205x = 82,729,866,384
5. Step 5: Solve for x
   x = 82,729,866,384/131,205
6. Step 6: Final answer
   x = 630,538.98