Finding the Third Proportional to 127,272 and 287,548

Step by Step Solution

1. Step 1: Write the proportion equation
   127,272 : 287,548 = 287,548 : x
2. Step 2: Convert to fraction form
   127,272/287,548 = 287,548/x
3. Step 3: Cross multiply
   127,272x = 287,548 × 287,548
4. Step 4: Simplify right side
   127,272x = 82,683,852,304
5. Step 5: Solve for x
   x = 82,683,852,304/127,272
6. Step 6: Final answer
   x = 649,662.55