Finding the Third Proportional to 584,494 and 1,256,390

Step by Step Solution

1. Step 1: Write the proportion equation
   584,494 : 1,256,390 = 1,256,390 : x
2. Step 2: Convert to fraction form
   584,494/1,256,390 = 1,256,390/x
3. Step 3: Cross multiply
   584,494x = 1,256,390 × 1,256,390
4. Step 4: Simplify right side
   584,494x = 1,578,515,832,100
5. Step 5: Solve for x
   x = 1,578,515,832,100/584,494
6. Step 6: Final answer
   x = 2,700,653.61