Finding the Third Proportional to 602,799 and 820,909.50

Step by Step Solution

1. Step 1: Write the proportion equation
   602,799 : 820,909.50 = 820,909.50 : x
2. Step 2: Convert to fraction form
   602,799/820,909.50 = 820,909.50/x
3. Step 3: Cross multiply
   602,799x = 820,909.50 × 820,909.50
4. Step 4: Simplify right side
   602,799x = 673,892,407,190.25
5. Step 5: Solve for x
   x = 673,892,407,190.25/602,799
6. Step 6: Final answer
   x = 1,117,938.83