Finding the Third Proportional to 250,548 and 387,780

Step by Step Solution

1. Step 1: Write the proportion equation
   250,548 : 387,780 = 387,780 : x
2. Step 2: Convert to fraction form
   250,548/387,780 = 387,780/x
3. Step 3: Cross multiply
   250,548x = 387,780 × 387,780
4. Step 4: Simplify right side
   250,548x = 150,373,328,400
5. Step 5: Solve for x
   x = 150,373,328,400/250,548
6. Step 6: Final answer
   x = 600,177.72