Finding the Third Proportional to 774,144 and 1,172,880

Step by Step Solution

1. Step 1: Write the proportion equation
   774,144 : 1,172,880 = 1,172,880 : x
2. Step 2: Convert to fraction form
   774,144/1,172,880 = 1,172,880/x
3. Step 3: Cross multiply
   774,144x = 1,172,880 × 1,172,880
4. Step 4: Simplify right side
   774,144x = 1,375,647,494,400
5. Step 5: Solve for x
   x = 1,375,647,494,400/774,144
6. Step 6: Final answer
   x = 1,776,991.74