Finding the Third Proportional to 578,504 and 1,256,513

Step by Step Solution

1. Step 1: Write the proportion equation
   578,504 : 1,256,513 = 1,256,513 : x
2. Step 2: Convert to fraction form
   578,504/1,256,513 = 1,256,513/x
3. Step 3: Cross multiply
   578,504x = 1,256,513 × 1,256,513
4. Step 4: Simplify right side
   578,504x = 1,578,824,919,169
5. Step 5: Solve for x
   x = 1,578,824,919,169/578,504
6. Step 6: Final answer
   x = 2,729,151.26