Finding the Third Proportional to 127,270 and 287,543

Step by Step Solution

1. Step 1: Write the proportion equation
   127,270 : 287,543 = 287,543 : x
2. Step 2: Convert to fraction form
   127,270/287,543 = 287,543/x
3. Step 3: Cross multiply
   127,270x = 287,543 × 287,543
4. Step 4: Simplify right side
   127,270x = 82,680,976,849
5. Step 5: Solve for x
   x = 82,680,976,849/127,270
6. Step 6: Final answer
   x = 649,650.17