Finding the Third Proportional to 666,144 and 1,356,960

Step by Step Solution

1. Step 1: Write the proportion equation
   666,144 : 1,356,960 = 1,356,960 : x
2. Step 2: Convert to fraction form
   666,144/1,356,960 = 1,356,960/x
3. Step 3: Cross multiply
   666,144x = 1,356,960 × 1,356,960
4. Step 4: Simplify right side
   666,144x = 1,841,340,441,600
5. Step 5: Solve for x
   x = 1,841,340,441,600/666,144
6. Step 6: Final answer
   x = 2,764,177.78