Finding the Third Proportional to 402,556.50 and 853,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   402,556.50 : 853,105.50 = 853,105.50 : x
2. Step 2: Convert to fraction form
   402,556.50/853,105.50 = 853,105.50/x
3. Step 3: Cross multiply
   402,556.50x = 853,105.50 × 853,105.50
4. Step 4: Simplify right side
   402,556.50x = 727,788,994,130.25
5. Step 5: Solve for x
   x = 727,788,994,130.25/402,556.50
6. Step 6: Final answer
   x = 1,807,917.63