Finding the Third Proportional to 250,553 and 387,494

Step by Step Solution

1. Step 1: Write the proportion equation
   250,553 : 387,494 = 387,494 : x
2. Step 2: Convert to fraction form
   250,553/387,494 = 387,494/x
3. Step 3: Cross multiply
   250,553x = 387,494 × 387,494
4. Step 4: Simplify right side
   250,553x = 150,151,600,036
5. Step 5: Solve for x
   x = 150,151,600,036/250,553
6. Step 6: Final answer
   x = 599,280.79