Finding the Third Proportional to 139,449 and 287,150

Step by Step Solution

1. Step 1: Write the proportion equation
   139,449 : 287,150 = 287,150 : x
2. Step 2: Convert to fraction form
   139,449/287,150 = 287,150/x
3. Step 3: Cross multiply
   139,449x = 287,150 × 287,150
4. Step 4: Simplify right side
   139,449x = 82,455,122,500
5. Step 5: Solve for x
   x = 82,455,122,500/139,449
6. Step 6: Final answer
   x = 591,292.32