Finding the Third Proportional to 561,040 and 789,144

Step by Step Solution

1. Step 1: Write the proportion equation
   561,040 : 789,144 = 789,144 : x
2. Step 2: Convert to fraction form
   561,040/789,144 = 789,144/x
3. Step 3: Cross multiply
   561,040x = 789,144 × 789,144
4. Step 4: Simplify right side
   561,040x = 622,748,252,736
5. Step 5: Solve for x
   x = 622,748,252,736/561,040
6. Step 6: Final answer
   x = 1,109,989.04