Finding the Third Proportional to 287,229 and 613,554

Step by Step Solution

1. Step 1: Write the proportion equation
   287,229 : 613,554 = 613,554 : x
2. Step 2: Convert to fraction form
   287,229/613,554 = 613,554/x
3. Step 3: Cross multiply
   287,229x = 613,554 × 613,554
4. Step 4: Simplify right side
   287,229x = 376,448,510,916
5. Step 5: Solve for x
   x = 376,448,510,916/287,229
6. Step 6: Final answer
   x = 1,310,621.53