Finding the Third Proportional to 856,817 and 1,861,131

Step by Step Solution

1. Step 1: Write the proportion equation
   856,817 : 1,861,131 = 1,861,131 : x
2. Step 2: Convert to fraction form
   856,817/1,861,131 = 1,861,131/x
3. Step 3: Cross multiply
   856,817x = 1,861,131 × 1,861,131
4. Step 4: Simplify right side
   856,817x = 3,463,808,599,161
5. Step 5: Solve for x
   x = 3,463,808,599,161/856,817
6. Step 6: Final answer
   x = 4,042,646.91