Finding the Third Proportional to 856,813 and 1,861,123

Step by Step Solution

1. Step 1: Write the proportion equation
   856,813 : 1,861,123 = 1,861,123 : x
2. Step 2: Convert to fraction form
   856,813/1,861,123 = 1,861,123/x
3. Step 3: Cross multiply
   856,813x = 1,861,123 × 1,861,123
4. Step 4: Simplify right side
   856,813x = 3,463,778,821,129
5. Step 5: Solve for x
   x = 3,463,778,821,129/856,813
6. Step 6: Final answer
   x = 4,042,631.03