Finding the Third Proportional to 250,554 and 387,789

Step by Step Solution

1. Step 1: Write the proportion equation
   250,554 : 387,789 = 387,789 : x
2. Step 2: Convert to fraction form
   250,554/387,789 = 387,789/x
3. Step 3: Cross multiply
   250,554x = 387,789 × 387,789
4. Step 4: Simplify right side
   250,554x = 150,380,308,521
5. Step 5: Solve for x
   x = 150,380,308,521/250,554
6. Step 6: Final answer
   x = 600,191.21