Finding the Third Proportional to 551,628 and 857,675.25

Step by Step Solution

1. Step 1: Write the proportion equation
   551,628 : 857,675.25 = 857,675.25 : x
2. Step 2: Convert to fraction form
   551,628/857,675.25 = 857,675.25/x
3. Step 3: Cross multiply
   551,628x = 857,675.25 × 857,675.25
4. Step 4: Simplify right side
   551,628x = 735,606,834,462.56
5. Step 5: Solve for x
   x = 735,606,834,462.56/551,628
6. Step 6: Final answer
   x = 1,333,519.75