Finding the Third Proportional to 401,152.50 and 853,821

Step by Step Solution

1. Step 1: Write the proportion equation
   401,152.50 : 853,821 = 853,821 : x
2. Step 2: Convert to fraction form
   401,152.50/853,821 = 853,821/x
3. Step 3: Cross multiply
   401,152.50x = 853,821 × 853,821
4. Step 4: Simplify right side
   401,152.50x = 729,010,300,041
5. Step 5: Solve for x
   x = 729,010,300,041/401,152.50
6. Step 6: Final answer
   x = 1,817,289.68