Finding the Third Proportional to 550,724 and 1,205,128

Step by Step Solution

1. Step 1: Write the proportion equation
   550,724 : 1,205,128 = 1,205,128 : x
2. Step 2: Convert to fraction form
   550,724/1,205,128 = 1,205,128/x
3. Step 3: Cross multiply
   550,724x = 1,205,128 × 1,205,128
4. Step 4: Simplify right side
   550,724x = 1,452,333,496,384
5. Step 5: Solve for x
   x = 1,452,333,496,384/550,724
6. Step 6: Final answer
   x = 2,637,134.93