Finding the Third Proportional to 400,243.78 and 856,711.69

Step by Step Solution

1. Step 1: Write the proportion equation
   400,243.78 : 856,711.69 = 856,711.69 : x
2. Step 2: Convert to fraction form
   400,243.78/856,711.69 = 856,711.69/x
3. Step 3: Cross multiply
   400,243.78x = 856,711.69 × 856,711.69
4. Step 4: Simplify right side
   400,243.78x = 733,954,915,499.10
5. Step 5: Solve for x
   x = 733,954,915,499.10/400,243.78
6. Step 6: Final answer
   x = 1,833,769.69