Finding the Third Proportional to 274,648 and 425,040

Step by Step Solution

1. Step 1: Write the proportion equation
   274,648 : 425,040 = 425,040 : x
2. Step 2: Convert to fraction form
   274,648/425,040 = 425,040/x
3. Step 3: Cross multiply
   274,648x = 425,040 × 425,040
4. Step 4: Simplify right side
   274,648x = 180,659,001,600
5. Step 5: Solve for x
   x = 180,659,001,600/274,648
6. Step 6: Final answer
   x = 657,783.79