Finding the Third Proportional to 131,188 and 287,000

Step by Step Solution

1. Step 1: Write the proportion equation
   131,188 : 287,000 = 287,000 : x
2. Step 2: Convert to fraction form
   131,188/287,000 = 287,000/x
3. Step 3: Cross multiply
   131,188x = 287,000 × 287,000
4. Step 4: Simplify right side
   131,188x = 82,369,000,000
5. Step 5: Solve for x
   x = 82,369,000,000/131,188
6. Step 6: Final answer
   x = 627,869.93