Finding the Third Proportional to 774,144 and 1,138,446

Step by Step Solution

1. Step 1: Write the proportion equation
   774,144 : 1,138,446 = 1,138,446 : x
2. Step 2: Convert to fraction form
   774,144/1,138,446 = 1,138,446/x
3. Step 3: Cross multiply
   774,144x = 1,138,446 × 1,138,446
4. Step 4: Simplify right side
   774,144x = 1,296,059,294,916
5. Step 5: Solve for x
   x = 1,296,059,294,916/774,144
6. Step 6: Final answer
   x = 1,674,183.74