Finding the Third Proportional to 602,838 and 820,966.50

Step by Step Solution

1. Step 1: Write the proportion equation
   602,838 : 820,966.50 = 820,966.50 : x
2. Step 2: Convert to fraction form
   602,838/820,966.50 = 820,966.50/x
3. Step 3: Cross multiply
   602,838x = 820,966.50 × 820,966.50
4. Step 4: Simplify right side
   602,838x = 673,985,994,122.25
5. Step 5: Solve for x
   x = 673,985,994,122.25/602,838
6. Step 6: Final answer
   x = 1,118,021.75